| Alexander | Grover | Player | Dead Ball Era | https://irishbaseball.org/bios/grover-alexander-county-louth/ | 2/26/1887 | Louth |
| Alonso | Peter | Player | Modern Era | https://irishbaseball.org/bios/peter-alonso-county-donegal/ | 12/7/1994 | Donegal |
| Anderson | Sparky | Manager/Coach | Modern Era | https://irishbaseball.org/bios/sparky-anderson-county-clare/ | 2/22/1934 | Clare |
| Archer | Jimmy | Player | Dead Ball Era | https://irishbaseball.org/bios/jimmy-archer-county-dublin/ | 5/13/1883 | Dublin |
| Ashburn | Richie | Player | Modern Era | https://irishbaseball.org/bios/richie-ashburn-county-antrim/ | 3/19/1927 | Antrim |
| Bagwell | Jeff | Player | Modern Era | https://irishbaseball.org/bios/jeff-bagwell-county-galway/ | 5/28/1968 | Galway |
| Barry | Jack | Player | Dead Ball Era | https://irishbaseball.org/bios/jack-barry-county-kerry/ | 4/26/1887 | Kerry |
| Bellinger | Cody | Player | Modern Era | https://irishbaseball.org/bios/cody-bellinger-county-donegal/ | 7/13/1995 | Donegal |
| Biggio | Craig | Player | Modern Era | https://irishbaseball.org/bios/craig-biggio-county-tyrone/ | 12/14/1965 | Tyrone |
| Blackmon | Charlie | Player | Modern Era | https://irishbaseball.org/bios/charlie-blackmon-county-antrim/ | 7/1/1986 | Antrim |
| Boggs | Wade | Player | Modern Era | https://irishbaseball.org/bios/wade-boggs-county-dublin/ | 6/15/1958 | Dublin |
| Bond | Tommy | Player | Emerald Age | https://irishbaseball.org/bios/tommy-bond-county-longford/ | 4/2/1856 | Longford |
| Brennaman | Marty | Media | Modern Era | https://irishbaseball.org/bios/marty-brennaman-county-laois/ | 7/28/1942 | Laois |
| Breslin | Jimmy | Media | Modern Era | https://irishbaseball.org/bios/jimmy-breslin-county-cork/ | 10/17/1928 | Cork |
| Bresnahan | Roger | Player | Dead Ball Era | https://irishbaseball.org/bios/roger-bresnahan-county-limerick/ | 6/11/1879 | Limerick |
| Brett | George | Player | Modern Era | https://irishbaseball.org/bios/george-brett-county-galway/ | 5/15/1953 | Galway |
| Brett | Ken | Player | Modern Era | https://irishbaseball.org/bios/ken-brett-county-galway/ | 9/18/1948 | Galway |
| Brouthers | Dan | Player | Modern Era | https://irishbaseball.org/bios/dan-brouthers-county-cork/ | 5/8/1858 | Cork |
| Brown | Mordecai | Player | Dead Ball Era | https://irishbaseball.org/bios/mordecai-brown-county-derry/ | 10/19/1876 | Derry |
| Bryant | Kris | Player | Modern Era | https://irishbaseball.org/bios/kris-bryant-county-wexford/ | 1/4/1992 | Wexford |
| Buck | Jack | Media | Modern Era | https://irishbaseball.org/bios/jack-buck-county-kerry/ | 8/21/1924 | Kerry |
| Buck | Joe | Media | Modern Era | https://irishbaseball.org/bios/joe-buck-county-kerry/ | 8/25/1969 | Kerry |
| Buckner | Bill | Player | Modern Era | https://irishbaseball.org/bios/bill-buckner-county-donegal/ | 12/14/1949 | Donegal |
| Buehler | Walker | Player | Modern Era | https://irishbaseball.org/bios/walker-buehler-county-laois/ | 6/28/1994 | Laois |
| Bunning | Jim | Player | Modern Era | https://irishbaseball.org/bios/jim-bunning-county-cork/ | 10/23/1931 | Cork |
| Caruthers | Bob | Player | Emerald Age | https://irishbaseball.org/bios/bob-caruthers-county-donegal/ | 1/5/1864 | Donegal |
| Casey | Doc | Player | Dead Ball Era | https://irishbaseball.org/bios/doc-casey-county-clare/ | 3/15/1870 | Clare |
| Casey | Sean | Player | Modern Era | https://irishbaseball.org/bios/sean-casey-county-sligo/ | 7/2/1974 | Sligo |
| Cashman | Brian | Executive | Modern Era | https://irishbaseball.org/bios/brian-cashman-county-waterford/ | 7/3/1967 | Waterford |
| Cashman | Terry | Media | Modern Era | https://irishbaseball.org/bios/terry-cashman-county-clare/ | 7/5/1941 | Clare |
| Clark | Will | Player | Modern Era | https://irishbaseball.org/bios/will-clark-county-kildare/ | 3/13/1964 | Kildare |
| Clarkson | John | Player | Modern Era | https://irishbaseball.org/bios/john-clarkson-county-clare/ | 7/1/1861 | Clare |
| Cleary | Joseph | Player | Modern Era | https://irishbaseball.org/bios/joseph-cleary-county-cork/ | 12/3/1918 | Cork |
| Clemens | Roger | Player | Modern Era | https://irishbaseball.org/bios/roger-clemens-county-leitrim/ | 8/4/1962 | Leitrim |
| Coleman | Ed | Media | Modern Era | https://irishbaseball.org/bios/ed-coleman-county-kerry/ | 5/2/1905 | Kerry |
| Coleman | Jerry | Media | Modern Era | https://irishbaseball.org/bios/jerry-coleman-county-cork/ | 9/14/1924 | Cork |
| Collins | Bill | Player | Emerald Age | https://irishbaseball.org/bios/bill-collins-county-dublin/ | 2/5/1905 | Dublin |
| Collins | Eddie | Player | Dead Ball Era | https://irishbaseball.org/bios/eddie-collins-county-cork/ | 5/2/1877 | Cork |
| Collins | Jimmy | Player | Dead Ball Era | https://irishbaseball.org/bios/jimmy-collins-county-antrim/ | 1/15/1879 | Antrim |
| Comiskey | Charles | Executive | Emerald Age | https://irishbaseball.org/bios/charles-comiskey-county-cavan/ | 8/15/1849 | Cavan |
| Cone | David | Player | Modern Era | https://irishbaseball.org/bios/david-cone-county-carlow/ | 1/2/1963 | Carlow |
| Conlan | Jocko | Umpire | Modern Era | https://irishbaseball.org/bios/jocko-conlan-county-kilkenny/ | 12/6/1899 | Kilkenny |
| Conley | Gene | Player | Modern Era | https://irishbaseball.org/bios/gene-conley-county-donegal/ | 11/10/1930 | Donegal |
| Conlon | PJ | Player | Modern Era | https://irishbaseball.org/bios/pj-conlon-county-antrim/ | 11/11/1993 | Antrim |
| Connally | Sarge | Player | Modern Era | https://irishbaseball.org/bios/sarge-connally-county-donegal/ | 8/31/1898 | Donegal |
| Connolly | Tommy | Umpire | Dead Ball Era | https://irishbaseball.org/bios/tommy-connolly-county-mayo/ | 12/31/1870 | Mayo |
| Connor | Roger | Player | Emerald Age | https://irishbaseball.org/bios/roger-connor-county-kerry/ | 7/1/1857 | Kerry |
| Connors | Chuck | Player | Modern Era | https://irishbaseball.org/bios/chuck-connors-county-waterford/ | 4/10/2021 | Waterford |
| Corcoran | Larry | Player | Modern Era | https://irishbaseball.org/bios/larry-corcoran-county-meath/ | 8/10/1859 | Meath |
| Costas | Bob | Media | Modern Era | https://irishbaseball.org/bios/bob-costas-county-limerick/ | 3/22/1952 | Limerick |
| Costner | Kevin | Media | Modern Era | https://irishbaseball.org/bios/kevin-costner-county-fermanagh/ | 1/18/1955 | Fermanagh |
| Cronin | Joe | Player | Modern Era | https://irishbaseball.org/bios/joe-cronin-county-kerry/ | 10/12/1906 | Kerry |
| Curran | John | Player | Emerald Age | https://irishbaseball.org/bios/john-curran-county-kerry/ | 1/25/1905 | Kerry |
| Culp | Ray | Player | Modern Era | https://irishbaseball.org/bios/ray-culp-county-down/ | 1220/1941 | Down |
| Cuyler | Kiki | Player | Modern Era | https://irishbaseball.org/bios/kiki-cuyler-county-down/ | 8/30/1898 | Down |
| Daily | Hugh | Player | Emerald Age | https://irishbaseball.org/bios/hugh-daily-county-cavan/ | 7/17/1847 | Cavan |
| Dalbec | Bobby | Player | Modern Era | https://irishbaseball.org/bios/bobby-dalbec-county-mayo/ | 7/29/1995 | Mayo |
| Daniels | Peter | Player | Emerald Age | https://irishbaseball.org/bios/peter-daniels-county-cavan/ | 4/8/1864 | Cavan |
| Deasly | Pat | Player | Emerald Age | https://irishbaseball.org/bios/pat-deasly-county-dublin/ | 11/17/1858 | Dublin |
| Decinces | Doug | Player | Modern Era | https://irishbaseball.org/bios/doug-decinces-county-meath/ | 8/29/1950 | Meath |
| DeGrom | Jake | Player | Modern Era | https://irishbaseball.org/bios/jake-degrom-county-laois/ | 6/19/1988 | Laois |
| Delahanty | Ed | Player | Emerald Age | https://irishbaseball.org/bios/ed-delahanty-county-kilkenny/ | 10/30/1867 | Kilkenny |
| Desmond | Ian | Player | Modern Era | https://irishbaseball.org/bios/ian-desmond-county-cavan/ | 9/20/1985 | Cavan |
| Devine | Bing | Executive | Modern Era | https://irishbaseball.org/bios/bing-devine-county-waterford/ | 3/1/1916 | Waterford |
| Devlin | Art | Player | Dead Ball Era | https://irishbaseball.org/bios/art-devlin-county-dublin/ | 10/15/1879 | Dublin |
| Dickey | Bill | Player | Modern Era | https://irishbaseball.org/bios/bill-dickey-county-antrim/ | 6/6/1907 | Antrim |
| Dillon | Pop | Player | Dead Ball Era | https://irishbaseball.org/bios/pop-dillon-county-kilkenny/ | 10/171873 | Kilkenny |
| Dinneen | Bill | Player | Dead Ball Era | https://irishbaseball.org/bios/bill-dinneen-county-cork/ | 4/5/1876 | Cork |
| Donlin | Mike | Player | Dead Ball Era | https://irishbaseball.org/bios/mike-donlin-county-clare/ | 5/30/1878 | Clare |
| Donohue | Steve | Manager/Coach | Modern Era | https://irishbaseball.org/bios/steve-donohue-county-cork/ | 1956 | Cork |
| Donovan | Dick | Player | Modern Era | https://irishbaseball.org/bios/dick-donovan-county-cork/ | 12/7/1927 | Cork |
| Donovan | Patsy | Player | Emerald Age | https://irishbaseball.org/bios/patsy-donovan-county-cork/ | 3/16/1865 | Cork |
| Dorgan | Mike | Player | Emerald Age | https://irishbaseball.org/bios/mike-dorgan-county-cork/ | 10/2/1853 | Cork |
| Dowling | Peter | Player | Dead Ball Era | https://irishbaseball.org/bios/peter-dowling-county-wicklow/ | 7/15/1876 | Wicklow |
| Dowse | Tom | Player | Emerald Age | https://irishbaseball.org/bios/tom-dowse-county-leitrim/ | 8/12/1866 | Leitrim |
| Doyle | Conny | Player | Emerald Age | https://irishbaseball.org/bios/conny-doyle-county-kerry/ | 2/4/1905 | Kerry |
| Doyle | Jack | Player | Emerald Age | https://irishbaseball.org/bios/jack-doyle-county-kerry/ | 10/25/1869 | Kerry |
| Doyle | Larry | Player | Dead Ball Era | https://irishbaseball.org/bios/larry-doyle-county-dublin/ | 7/31/1886 | Dublin |
| Duffy | Hugh | Player | Emerald Age | https://irishbaseball.org/bios/hugh-duffy-county-monaghan/ | 11/26/1866 | Monaghan |
| Dunn | Adam | Player | Modern Era | https://irishbaseball.org/bios/adam-dunn-county-waterford/ | 11/9/1979 | Waterford |
| Duvall | Adam | Player | Modern Era | https://irishbaseball.org/bios/adam-duvall-county-donegal/ | 9/4/1988 | Donegal |
| Eckersley | Dennis | Player | Modern Era | https://irishbaseball.org/bios/dennis-eckersley-county-armagh/ | 10/3/1954 | Armagh |
| Ellis | Dock | Player | Modern Era | https://irishbaseball.org/bios/dock-ellis-county-tyrone/ | 3/11/1945 | Tyrone |
| Evers | Johnny | Player | Dead Ball Era | https://irishbaseball.org/bios/johnny-evers-county-westmeath/ | 7/21/1881 | Westmeath |
| Farmer | Bill | Player | Emerald Age | https://irishbaseball.org/bios/bill-farmer-county-dublin/ | 2/13/1864 | Dublin |
| Farrell | Turk | Player | Modern Era | https://irishbaseball.org/bios/turk-farrell-county-dublin/ | 4/8/1934 | Dublin |
| Feeney | Chub | Executive | Modern Era | https://irishbaseball.org/bios/chub-feeney-county-sligo/ | 8/13/21 | Sligo |
| Ferrell | Rick | Player | Modern Era | https://irishbaseball.org/bios/rick-ferrell-county-down/ | 10/12/1905 | Down |
| Ferrell | Wes | Player | Modern Era | https://irishbaseball.org/bios/wes-ferrell-county-down/ | 2/2/1908 | Down |
| Fidrych | Mark | Player | Modern Era | https://irishbaseball.org/bios/mark-fidrych-county-cork/ | 8/14/1954 | Cork |
| Fields | Jocko | Player | Emerald Age | https://irishbaseball.org/bios/jocko-fields-county-cork/ | 10/20/1864 | Cork |
| Finley | Chuck | Player | Modern Era | https://irishbaseball.org/bios/chuck-finley-county-cork/ | 11/26/1962 | Cork |
| Flaherty | John | Player | Modern Era | https://irishbaseball.org/bios/john-flaherty-county-kerry/ | 10/21/1967 | Kerry |
| Flanagan | Mike | Player | Modern Era | https://irishbaseball.org/bios/mike-flanagan-county-clare/ | 12/16/1951 | Clare |
| Flynn | Mike | Player | Emerald Age | https://irishbaseball.org/bios/mike-flynn-county-kildare/ | 3/15/1872 | Kildare |
| Flynn | Peter | Manager/Coach | Modern Era | https://irishbaseball.org/bios/peter-flynn-county-leitrim/ | 2/12/1938 | Leitrim |
| Foley | Curry | Player | Emerald Age | https://irishbaseball.org/bios/curry-foley-county-kerry/ | 1/16/1856 | Kerry |
| Foley | Red | Media | Modern Era | https://irishbaseball.org/bios/red-foley-county-cork/ | 12/26/1928 | Cork |
| Foli | Tim | Player | Modern Era | https://irishbaseball.org/bios/tim-foli-county-kilkenny/ | 12/8/1950 | Kilkenny |
| Ford | Whitey | Player | Modern Era | https://irishbaseball.org/bios/whitey-ford-county-dublin/ | 10/21/1928 | Dublin |
| Forde | Shannon | Manager/Coach | Modern Era | https://irishbaseball.org/bios/shannon-forde-county-kerry/ | 1972 | Kerry |
| Foxx | Jimmie | Player | Modern Era | https://irishbaseball.org/bios/jimmie-foxx-county-wicklow/ | 10/22/1907 | Wicklow |
| Freehan | Bill | Player | Modern Era | https://irishbaseball.org/bios/bill-freehan-county-longford/ | 11/29/1941 | Longford |
| Freeman | Freddie | Player | Modern Era | https://irishbaseball.org/bios/freddie-freeman-county-dublin/ | 9/12/1989 | Dublin |
| Gallagher | Guy | Manager/Coach | Modern Era | https://irishbaseball.org/bios/guy-gallagher-county-donegal/ | 8/27/1966 | Donegal |
| Galvin | Pud | Player | Emerald Age | https://irishbaseball.org/bios/pud-galvin-county-clare/ | 12/25/1855 | Clare |
| Garver | Ned | Player | Modern Era | https://irishbaseball.org/bios/ned-garver-county-dublin/ | 12/25/1925 | Dublin |
| Garvey | Steve | Player | Modern Era | https://irishbaseball.org/bios/steve-garvey-county-louth/ | 12/22/1948 | Louth |
| Gibson | Kirk | Player | Modern Era | https://irishbaseball.org/bios/kirk-gibson-county-antrim/ | 5/28/1957 | Antrim |
| Glavine | Tom | Player | Modern Era | https://irishbaseball.org/bios/tom-glavine-county-cork/ | 3/29/1966 | Cork |
| Gleeson | Jim | Player | Modern Era | https://irishbaseball.org/bios/jim-gleeson-county-clare/ | 3/5/1912 | Clare |
| Gorman | Tom | Umpire | Modern Era | https://irishbaseball.org/bios/tom-gorman-county-limerick/ | 3/15/1919 | Limerick |
| Groat | Dick | Player | Modern Era | https://irishbaseball.org/bios/dick-groat-county-down/ | 11/4/1930 | Down |
| Grove | Lefty | Player | Modern Era | https://irishbaseball.org/bios/lefty-grove-county-derry/ | 3/6/1900 | Derry |
| Guidry | Ron | Player | Modern Era | https://irishbaseball.org/bios/ron-guidry-county-cork/ | 8/28/1950 | Cork |
| Hafey | Chick | Player | Modern Era | https://irishbaseball.org/bios/chick-hafey-county-cork/ | 2/12/1903 | Cork |
| Hallinan | Jimmy | Player | Emerald Age | https://irishbaseball.org/bios/jimmy-hallinan-county-dublin/ | 5/27/1849 | Dublin |
| Hamilton | Billy | Player | Emerald Age | https://irishbaseball.org/bios/billy-hamilton-county-down/ | 2/16/1886 | Down |
| Hanlon | Ned | Manager/Coach | Emerald Age | https://irishbaseball.org/bios/ned-hanlon-county-armagh/ | 8/22/1857 | Armagh |
| Harrington | Joe | Player | Emerald Age | https://irishbaseball.org/bios/joe-harrington-county-cork/ | 12/21/1869 | Cork |
| Hartnett | Gabby | Player | Modern Era | https://irishbaseball.org/bios/gabby-hartnett-county-tipperary/ | 12/10/1900 | Tipperary |
| Helton | Todd | Player | Modern Era | https://irishbaseball.org/bios/todd-helton-county-dublin/ | 8/20/1973 | Dublin |
| Hernandez | Keith | Player | Modern Era | https://irishbaseball.org/bios/keith-hernandez-county-kerry/ | 10/20/1953 | Kerry |
| Hines | Mike | Player | Emerald Age | https://irishbaseball.org/bios/mike-hines-county-kerry/ | 9/1/1862 | Kerry |
| Hodges | Gil | Player | Modern Era | https://irishbaseball.org/bios/gil-hodges-county-sligo/ | 4/4/1924 | Sligo |
| Horan | Patrick | Player | Emerald Age | https://irishbaseball.org/bios/patrick-horan-county-clare/ | | Clare |
| Hornsby | Rogers | Player | Modern Era | https://irishbaseball.org/bios/rogers-hornsby-county-tyrone/ | 4/27/1896 | Tyrone |
| Horrigan | Jeff | Media | Modern Era | https://irishbaseball.org/bios/jeff-horrigan-county-kerry/ | 4/16/1963 | Kerry |
| Hosmer | Eric | Player | Modern Era | https://irishbaseball.org/bios/eric-hosmer-county-laois/ | 10/24/1989 | Laois |
| Hubbard | Cal | Umpire | Modern Era | https://irishbaseball.org/bios/cal-hubbard-county-kerry/ | 10/31/1900 | Kerry |
| Huggins | Miller | Manager/Coach | Modern Era | https://irishbaseball.org/bios/miller-huggins-county-antrim/ | 4/19/1879 | Antrim |
| Hughes | Pat | Media | Modern Era | https://irishbaseball.org/bios/pat-hughes-county-donegal/ | 5/27/1955 | Donegal |
| James | Bill | Media | Modern Era | https://irishbaseball.org/bios/bill-james-county-derry/ | 10/5/1949 | Derry |
| Jennings | Hughie | Player | Emerald Age | https://irishbaseball.org/bios/hughie-jennings-county-mayo/ | 4/2/1869 | Mayo |
| Jeter | Derek | Player | Modern Era | https://irishbaseball.org/bios/derek-jeter-county-cork/ | 6/24/1974 | Cork |
| Johnson | Walter | Player | Dead Ball Era | https://irishbaseball.org/bios/walter-johnson-county-donegal/ | 11/6/1887 | Donegal |
| Joyce | Jim | Umpire | Modern Era | https://irishbaseball.org/bios/jim-joyce-county-galway/ | 10/3/1955 | Galway |
| Kaline | Al | Player | Modern Era | https://irishbaseball.org/bios/al-kaline-county-antrim/ | 12/19/1934 | Antrim |
| Kavanagh | Marty | Player | Dead Ball Era | https://irishbaseball.org/bios/marty-kavanagh-county-dublin/ | 6/13/1891 | Dublin |
| Keefe | Tim | Player | Emerald Age | https://irishbaseball.org/bios/tim-keefe-county-cork/ | 1/1/1857 | Cork |
| Keeler | Willie | Player | Emerald Age | https://irishbaseball.org/bios/willie-keeler-county-cork/ | 3/3/1872 | Cork |
| Kell | George | Player | Modern Era | https://irishbaseball.org/bios/george-kell-county-derry/ | 8/23/1922 | Derry |
| Kelley | Joe | Player | Emerald Age | https://irishbaseball.org/bios/joe-kelley-county-louth/ | 12/9/1871 | Louth |
| Kelly | Highpockets | Player | Dead Ball Era | https://irishbaseball.org/bios/highpockets-kelly-county-limerick/ | 9/10/1895 | Limerick |
| Kelly | Michael "King" | Player | Emerald Age | https://irishbaseball.org/bios/michael-king-kelly-county-roscommon/ | 12/31/1857 | Roscommon |
| Kelly | Tom | Player | Modern Era | https://irishbaseball.org/bios/tom-kelly-county-offaly/ | 8/15/1950 | Offaly |
| Keough | Matt | Player | Modern Era | https://irishbaseball.org/bios/matt-keough-county-armagh/ | 7/3/1955 | Armagh |
| Kenny | Brian | Media | Modern Era | https://irishbaseball.org/bios/brian-kenny-county-roscommon/ | 10/18/1963 | Roscommon |
| Kershaw | Clayton | Player | Modern Era | https://irishbaseball.org/bios/clayton-kershaw-county-tyrone/ | 3/19/1988 | Tyrone |
| Killebrew | Harmon | Player | Modern Era | https://irishbaseball.org/bios/harmon-killebrew-county-dublin/ | 6/29/1936 | Dublin |
| Kilroy | Matt | Player | Emerald Age | https://irishbaseball.org/bios/matt-kilroy-county-westmeath/ | 6/21/1866 | Westmeath |
| Kiner | Ralph | Player | Modern Era | https://irishbaseball.org/bios/ralph-kiner-county-derry/ | 10/27/1922 | Derry |
| Lee | Bill | Player | Modern Era | https://irishbaseball.org/bios/bill-lee-county-leitrim/ | 12/28/1946 | Leitrim |
| Leiter | Al | Player | Modern Era | https://irishbaseball.org/bios/al-leiter-county-antrim/ | 10/23/1965 | Antrim |
| Lennon | Chuck | Manager/Coach | Modern Era | https://irishbaseball.org/bios/chuck-lennon-county-roscommon/ | 6/10/1938 | Roscommon |
| Leonard | Andy | Player | Emerald Age | https://irishbaseball.org/bios/andy-leonard-county-cavan/ | 6/1/1846 | Cavan |
| Leonard | Dennis | Player | Modern Era | https://irishbaseball.org/bios/dennis-leonard-county-meath/ | 5/18/1951 | Meath |
| Leyland | Jim | Manager/Coach | Modern Era | https://irishbaseball.org/bios/jim-leyland-county-wexford/ | 12/15/1944 | Wexford |
| Lowell | Mike | Player | Modern Era | https://irishbaseball.org/bios/mike-lowell-county-dublin/ | 2/24/1974 | Dublin |
| Lucid | Con | Player | Emerald Age | https://irishbaseball.org/bios/con-lucid-county-dublin/ | 2/24/1874 | Dublin |
| Lyle | Sparky | Player | Modern Era | https://irishbaseball.org/bios/sparky-lyle-county-antrim/ | 7/22/1944 | Antrim |
| Mack | Connie | Manager/Coach | Dead Ball Era | https://irishbaseball.org/bios/connie-mack-county-kerry/ | 12/22/1862 | Kerry |
| Mack | Reddy | Player | Emerald Age | https://irishbaseball.org/bios/reddy-mack-county-down/ | 5/2/1866 | Down |
| Madden | Bill | Media | Modern Era | https://irishbaseball.org/bios/bill-madden-county-mayo/ | 1946 | Mayo |
| Maddux | Greg | Player | Modern Era | https://irishbaseball.org/bios/greg-maddux-county-cavan/ | 4/14/1966 | Cavan |
| Magee | Sherry | Player | Dead Ball Era | https://irishbaseball.org/bios/sherry-magee-county-fermanagh/ | 8/6/1884 | Fermanagh |
| Malone | Fergy | Player | Emerald Age | https://irishbaseball.org/bios/fergy-malone-county-tipperary/ | 1/17/1905 | Tipperary |
| Malone | Pat | Player | Modern Era | https://irishbaseball.org/bios/pat-malone-county-dublin/ | 9/25/1902 | Dublin |
| Manfred | Rob | Executive | Modern Era | https://irishbaseball.org/bios/rob-manfred-county-leitrim/ | 9/28/1958 | Leitrim |
| Manning | Jack | Player | Modern Era | https://irishbaseball.org/bios/jack-manning-county-cork/ | 12/20/1853 | Cork |
| Mathews | Eddie | Player | Modern Era | https://irishbaseball.org/bios/eddie-mathews-county-donegal/ | 10/13/1931 | Donegal |
| Mauer | Joe | Player | Modern Era | https://irishbaseball.org/bios/joe-mauer-county-mayo/ | 4/18/1983 | Mayo |
| McAleer | James | Manager/Coach | Emerald Age | https://irishbaseball.org/bios/james-mcaleer-county-tyrone/ | 7/10/1864 | Tyrone |
| McCarthy | Joseph | Manager/Coach | Modern Era | https://irishbaseball.org/bios/joseph-mccarthy-county-limerick/ | 4/21/1887 | Limerick |
| McCarthy | Tommy | Player | Emerald Age | https://irishbaseball.org/bios/tommy-mccarthy-county-kerry/ | 7/24/1863 | Kerry |
| McCarver | Tim | Player | Modern Era | https://irishbaseball.org/bios/tim-mccarver-county-tipperary/ | 10/16/1941 | Tipperary |
| McClanahan | Shane | Player | Modern Era | https://irishbaseball.org/bios/shane-mcclanahan-county-down/ | 4/28/1997 | Down |
| McCoy | Hal | Media | Modern Era | https://irishbaseball.org/bios/hal-mccoy-county-donegal/ | 10/18/1940 | Donegal |
| McCullough | Charlie | Player | Emerald Age | https://irishbaseball.org/bios/charlie-mccullough-county-dublin/ | 2/8/1905 | Dublin |
| McDougald | Gil | Player | Modern Era | https://irishbaseball.org/bios/gil-mcdougald-county-waterford/ | 5/19/1928 | Waterford |
| McDowell | Sam | Player | Modern Era | https://irishbaseball.org/bios/sam-mcdowell-county-kerry/ | 9/21/1942 | Kerry |
| McEwing | Joe | Player | Modern Era | https://irishbaseball.org/bios/joe-mcewing-county-sligo/ | 10/19/1972 | Sligo |
| McGinley | Tim | Player | Emerald Age | https://irishbaseball.org/bios/tim-mcginley-county-donegal/ | 1854 | Donegal |
| McGinnity | Joe | Player | Dead Ball Era | https://irishbaseball.org/bios/joe-mcginnity-county-dublin/ | 3/20/1871 | Dublin |
| McGowan | Bill | Umpire | Modern Era | https://irishbaseball.org/bios/bill-mcgowan-county-derry/ | 1/18/1896 | Derry |
| McGraw | John | Manager/Coach | Modern Era | https://irishbaseball.org/bios/john-mcgraw-county-tipperary/ | 4/7/1873 | Tipperary |
| McGraw | Tug | Player | Dead Ball Era | https://irishbaseball.org/bios/tug-mcgraw-county-down/ | 8/30/1944 | Down |
| McGuinness | John | Player | Emerald Age | https://irishbaseball.org/bios/john-mcguinness-county-dublin/ | 1/30/1905 | Dublin |
| McGwire | Mark | Player | Modern Era | https://irishbaseball.org/bios/mark-mcgwire-county-cork/ | 10/1/1963 | Cork |
| McIlveen | Irish | Player | Dead Ball Era | https://irishbaseball.org/bios/irish-mcilveen-county-down/ | 7/27/1880 | Down |
| McInnis | Stuffy | Player | Dead Ball Era | https://irishbaseball.org/bios/stuffy-mcinnis-county-limerick/ | 9/19/1890 | Limerick |
| McKeon | Jack | Manager/Coach | Modern Era | https://irishbaseball.org/bios/jack-mckeon-county-roscommon/ | 11/23/1930 | Roscommon |
| McLain | Denny | Player | Modern Era | https://irishbaseball.org/bios/denny-mclain-county-dublin/ | 3/29/1944 | Dublin |
| McLaughlin | Barney | Player | Modern Era | https://irishbaseball.org/bios/barney-mclaughlin-county-antrim/ | 2/4/1905 | Antrim |
| McManus | Pat | Player | Emerald Age | https://irishbaseball.org/bios/pat-mcmanus-county-dublin/ | 10/18/1859 | Dublin |
| McNally | Dave | Player | Modern Era | https://irishbaseball.org/bios/dave-mcnally-county-cork/ | 10/31/1942 | Cork |
| McNeil | Jeff | Player | Modern Era | https://irishbaseball.org/bios/jeff-mcneil-county-monaghan/ | 4/8/1992 | Monaghan |
| Melvin | Bob | Manager/Coach | Modern Era | https://irishbaseball.org/bios/bob-melvin-county-cavan/ | 10/28/1961 | Cavan |
| Michael | Gene | Executive | Modern Era | https://irishbaseball.org/bios/gene-michael-county-derry/ | 6/2/1938 | Derry |
| Miggins | Larry | Player | Modern Era | https://irishbaseball.org/bios/larry-miggins-county-westmeath/ | 8/20/1925 | Westmeath |
| Millar | Kevin | Player | Modern Era | https://irishbaseball.org/bios/kevin-millar-county-meath/ | 9/24/1971 | Meath |
| Mize | Johnny | Player | Modern Era | https://irishbaseball.org/bios/johnny-mize-county-antrim/ | 1/7/1913 | Antrim |
| Molitor | Paul | Player | Modern Era | https://irishbaseball.org/bios/paul-molitor-county-monaghan/ | 8/22/1956 | Monaghan |
| Monahan | Gene | Manager/Coach | Modern Era | https://irishbaseball.org/bios/gene-monahan-county-offaly/ | 10/2/1945 | Offaly |
| Morgan | Joe | Manager/Coach | Modern Era | https://irishbaseball.org/bios/joe-morgan-county-clare/ | 11/19/1930 | Clare |
| Morrill | John | Player | Emerald Age | https://irishbaseball.org/bios/john-morrill-county-kerry/ | 2/19/1855 | Kerry |
| Morris | Hal | Player | Modern Era | https://irishbaseball.org/bios/hal-morris-county-galway/ | 4/9/1965 | Galway |
| Mountcastle | Ryan | Player | Modern Era | https://irishbaseball.org/bios/ryan-mountcastle-county-donegal/ | 2/8/1997 | Donegal |
| Muldoon | Mike | Player | Modern Era | https://irishbaseball.org/bios/mike-muldoon-county-westmeath/ | 4/9/1858 | Westmeath |
| Mullane | Tony | Player | Emerald Age | https://irishbaseball.org/bios/tony-mullane-county-cork/ | 1/30/1859 | Cork |
| Murcer | Bobby | Player | Modern Era | https://irishbaseball.org/bios/bobby-murcer-county-derry/ | 5/20/1946 | Derry |
| Murnane | Tim | Player | Emerald Age | https://irishbaseball.org/bios/tim-murnane-county-tipperary/ | 6/4/1851 | Tipperary |
| Murphy | Bob | Media | Modern Era | https://irishbaseball.org/bios/bob-murphy-county-derry/ | 9/19/1924 | Derry |
| Murphy | Dale | Player | Modern Era | https://irishbaseball.org/bios/dale-murphy-county-dublin/ | 3/12/1956 | Dublin |
| Murphy | Johnny | Player | Modern Era | https://irishbaseball.org/bios/johnny-murphy-county-kerry/ | 7/14/1908 | Kerry |
| Murray | Bill | Executive | Modern Era | https://irishbaseball.org/bios/bill-murray-county-waterford/ | 9/21/1950 | Waterford |
| Murray | Jim | Media | Modern Era | https://irishbaseball.org/bios/jim-murray-county-cork/ | 12/29/1919 | Cork |
| Murray | Red | Player | Dead Ball Era | https://irishbaseball.org/bios/red-murray-county-kerry/ | 3/4/1884 | Kerry |
| Murtaugh | Danny | Manager/Coach | Modern Era | https://irishbaseball.org/bios/danny-murtaugh-county-mayo/ | 10/8/1917 | Mayo |
| Needham | Tom | Player | Dead Ball Era | https://irishbaseball.org/bios/tom-needham-county-cork/ | 4/17/1879 | Cork |
| Nelson | Jeff | Player | Modern Era | https://irishbaseball.org/bios/jeff-nelson-county-donegal/ | 11/17/1966 | Donegal |
| Nettles | Graig | Player | Modern Era | https://irishbaseball.org/bios/graig-nettles-county-tyrone/ | 8/20/1944 | Tyrone |
| Nicholl | Sam | Player | Emerald Age | https://irishbaseball.org/bios/sam-nicholl-county-antrim/ | 4/20/1869 | Antrim |
| Nimmo | Brandon | Player | Modern Era | https://irishbaseball.org/bios/brandon-nimmo-county-armagh/ | 3/27/1993 | Armagh |
| O'Brien | Dave | Media | Modern Era | https://irishbaseball.org/bios/dave-obrien-county-clare/ | 8/3/1963 | Clare |
| O'Connor | Paddy | Player | Dead Ball Era | https://irishbaseball.org/bios/paddy-oconnor-county-kerry/ | 8/4/1879 | Kerry |
| O'Connor | Johnny | Player | Modern Era | https://irishbaseball.org/bios/johnny-oconnor-county-kerry/ | 12/1/1891 | Kerry |
| O'Day | Hank | Umpire | Emerald Age | https://irishbaseball.org/bios/hank-oday-county-clare/ | 7/8/1859 | Clare |
| O'Doul | Lefty | Player | Modern Era | https://irishbaseball.org/bios/lefty-odoul-county-limerick/ | 3/4/1897 | Limerick |
| O'Hearn | Ryan | Player | Modern Era | https://irishbaseball.org/bios/ryan-ohearn-county-cork/ | 2/8/1997 | Cork |
| O'Loughlin | Pat | Player | Emerald Age | https://irishbaseball.org/bios/pat-oloughlin-county-clare/ | 2/2/1905 | Clare |
| O'Malley | Peter | Executive | Modern Era | https://irishbaseball.org/bios/peter-omalley-county-mayo/ | 12/12/1937 | Mayo |
| O'Malley | Walter | Executive | Modern Era | https://irishbaseball.org/bios/walter-omalley-county-mayo/ | 10/9/1903 | Mayo |
| O'Neill | Jack | Player | Dead Ball Era | https://irishbaseball.org/bios/jack-oneill-county-galway/ | 1/10/1873 | Galway |
| O'Neill | Jimmy | Player | Dead Ball Era | https://irishbaseball.org/bios/jimmy-oneill-county-galway/ | 2/23/1893 | Galway |
| O'Neill | Mike | Player | Dead Ball Era | https://irishbaseball.org/bios/mike-oneill-county-galway/ | 10/5/1877 | Galway |
| O'Neill | Paul | Player | Modern Era | https://irishbaseball.org/bios/paul-oneill-county-antrim/ | 2/25/1963 | Antrim |
| O'Neill | Steve | Manager/Coach | Modern Era | https://irishbaseball.org/bios/steve-oneill-county-galway/ | 7/6/1891 | Galway |
| O'Neill | Tip | Player | Emerald Age | https://irishbaseball.org/bios/tip-oneill-county-tyrone/ | 5/15/1860 | Tyrone |
| O'Rourke | Jim | Player | Emerald Age | https://irishbaseball.org/bios/jim-orourke-county-donegal/ | 9/1/1850 | Donegal |
| Orr | Dave | Player | Emerald Age | https://irishbaseball.org/bios/dave-orr-county-armagh/ | 9/29/1859 | Armagh |
| Palmer | Jim | Player | Modern Era | https://irishbaseball.org/bios/jim-palmer-county-leitrim/ | 10/15/1945 | Leitrim |
| Posey | Buster | Player | Modern Era | https://irishbaseball.org/bios/buster-posey-county-antrim/ | 3/27/1987 | Antrim |
| Powers | Doc | Player | Dead Ball Era | https://irishbaseball.org/bios/doc-powers-county-waterford/ | 9/22/1870 | Waterford |
| Reese | Pee Wee | Player | Modern Era | https://irishbaseball.org/bios/pee-wee-reese-county-antrim/ | 7/23/1918 | Antrim |
| Rendon | Anthony | Player | Modern Era | https://irishbaseball.org/bios/anthony-rendon-county-kilkenny/ | 6/6/1990 | Kilkenny |
| Ripken Jr | Cal | Player | Modern Era | https://irishbaseball.org/bios/cal-ripken-jr-county-donegal/ | 8/24/1960 | Donegal |
| Rizzo | Anthony | Player | Modern Era | https://irishbaseball.org/bios/anthony-rizzo-county-antrim/ | 8/8/1989 | Antrim |
| Roarke | Mike | Manager/Coach | Modern Era | https://irishbaseball.org/bios/mike-roarke-county-cavan/ | 11/8/1930 | Cavan |
| Roush | Edd | Player | Modern Era | https://irishbaseball.org/bios/edd-roush-county-cork/ | 5/8/1893 | Cork |
| Rudi | Joe | Player | Modern Era | https://irishbaseball.org/bios/joe-rudi-county-kerry/ | 9/7/1946 | Kerry |
| Rusie | Amos | Player | Emerald Age | https://irishbaseball.org/bios/amos-rusie-county-dublin/ | 5/30/1871 | Dublin |
| Ryan | Cyclone | Player | Emerald Age | https://irishbaseball.org/bios/cyclone-ryan-county-tipperary/ | 2/8/1905 | Tipperary |
| Ryan | Jimmy | Player | Emerald Age | https://irishbaseball.org/bios/jimmy-ryan-county-clare/ | 2/11/1863 | Clare |
| Ryan | Nolan | Player | Modern Era | https://irishbaseball.org/bios/nolan-ryan-county-tipperary/ | 1/31/1947 | Tipperary |
| Sale | Chris | Player | Modern Era | https://irishbaseball.org/bios/chris-sale-county-antrim/ | 3/30/1989 | Antrim |
| Scherzer | Max | Player | Modern Era | https://irishbaseball.org/bios/max-scherzer-county-fermanagh/ | 7/27/1984 | Fermanagh |
| Schofield | Dave | Media | Modern Era | https://irishbaseball.org/bios/dave-schofield-county-donegal/ | 7/29/1947 | Donegal |
| Schwarber | Kyle | Player | Modern Era | https://irishbaseball.org/bios/kyle-schwarber-county-donegal/ | 3/5/1993 | Donegal |
| Score | Herb | Player | Modern Era | https://irishbaseball.org/bios/herb-score-county-tyrone/ | 6/7/1933 | Tyrone |
| Scully | Vin | Media | Modern Era | https://irishbaseball.org/bios/vin-scully-county-cavan/ | 11/29/1997 | Cavan |
| Shaughnessy | Danny | Media | Modern Era | https://irishbaseball.org/bios/danny-shaughnessy-county-limerick/ | 7/20/1953 | Limerick |
| Shea | Bill | Executive | Modern Era | https://irishbaseball.org/bios/bill-shea-county-limerick/ | 6/21/1907 | Limerick |
| Shea | Spec | Player | Modern Era | https://irishbaseball.org/bios/spec-shea-county-dublin/ | 10/2/1920 | Dublin |
| Snitker | Brian | Manager/Coach | Modern Era | https://irishbaseball.org/bios/brian-snitker-county-limerick/ | 10/17/1955 | Limerick |
| Staub | Rusty | Player | Modern Era | https://irishbaseball.org/bios/rusty-staub-county-kilkenny/ | 4/1/1944 | Kilkenny |
| Steinbrenner | George | Executive | Modern Era | https://irishbaseball.org/bios/george-steinbrenner-county-antrim/ | 7/30/1930 | Antrim |
| Stengel | Casey | Manager/Coach | Modern Era | https://irishbaseball.org/bios/casey-stengel-county-roscommon/ | 7/30/1890 | Roscommon |
| Stoneham | Horace | Executive | Modern Era | https://irishbaseball.org/bios/horace-stoneham-county-wexford/ | 4/27/1903 | Wexford |
| Sullivan | Bill | Player | Emerald Age | https://irishbaseball.org/bios/bill-sullivan-county-cork/ | 7/4/1853 | Cork |
| Sullivan | Sleeper | Player | Emerald Age | https://irishbaseball.org/bios/sleeper-sullivan-county-cork/ | 2/1/1905 | Cork |
| Sullivan | Ted | Executive | Emerald Age | https://irishbaseball.org/bios/ted-sullivan-county-clare/ | 3/17/1851 | Clare |
| Sutton | Don | Player | Modern Era | https://irishbaseball.org/bios/don-sutton-county-down/ | 4/2/1945 | Down |
| Sweeney | Bill | Player | Dead Ball Era | https://irishbaseball.org/bios/bill-sweeney-county-cork/ | 3/6/1886 | Cork |
| Sweeney | Mike | Player | Modern Era | https://irishbaseball.org/bios/mike-sweeney-county-waterford/ | 7/22/1973 | Waterford |
| Tener | John | Executive | Emerald Age | https://irishbaseball.org/bios/john-tener-county-tyrone/ | 7/25/1863 | Tyrone |
| Terry | Bill | Player | Modern Era | https://irishbaseball.org/bios/bill-terry-county-armagh/ | 10/30/1898 | Armagh |
| Thompson | Sam | Player | Emerald Age | https://irishbaseball.org/bios/sam-thompson-county-derry/ | 3/5/1860 | Derry |
| Tobin | Jack | Player | Dead Ball Era | https://irishbaseball.org/bios/jack-tobin-county-cork/ | 5/4/1892 | Cork |
| Traynor | Pie | Player | Modern Era | https://irishbaseball.org/bios/pie-traynor-county-down/ | 11/11/1898 | Down |
| Trout | Mike | Player | Modern Era | https://irishbaseball.org/bios/mike-trout-county-limerick/ | 8/7/1991 | Limerick |
| Tudor | John | Player | Modern Era | https://irishbaseball.org/bios/john-tudor-county-cork/ | 2/2/1954 | Cork |
| Turner | Trea | Player | Modern Era | https://irishbaseball.org/bios/trea-turner-county-antrim/ | 6/30/1993 | Antrim |
| Utley | Chase | Player | Modern Era | https://irishbaseball.org/bios/chase-utley-county-donegal/ | 12/17/1978 | Donegal |
| Vance | Dazzy | Player | Modern Era | https://irishbaseball.org/bios/dazzy-vance-county-down/ | 3/4/1891 | Down |
| Verducci | Tom | Media | Modern Era | https://irishbaseball.org/bios/tom-verducci-county-longford/ | 10/23/1960 | Longford |
| Vernon | Mickey | Player | Modern Era | https://irishbaseball.org/bios/mickey-vernon-county-donegal/ | 4/22/1918 | Donegal |
| Waddell | Rube | Player | Dead Ball Era | https://irishbaseball.org/bios/rube-waddell-county-tyrone/ | 10/13/1876 | Tyrone |
| Walsh | Ed | Player | Dead Ball Era | https://irishbaseball.org/bios/ed-walsh-county-kildare/ | 5/14/1881 | Kildare |
| Walsh | Jimmy | Player | Modern Era | https://irishbaseball.org/bios/jimmy-walsh-county-mayo/ | 9/22/1885 | Mayo |
| Welch | Mickey | Player | Modern Era | https://irishbaseball.org/bios/mickey-welch-county-tipperary/ | 7/4/1859 | Tipperary |
| Werth | Jayson | Player | Modern Era | https://irishbaseball.org/bios/jayson-werth-county-antrim/ | 5/20/1979 | Antrim |
| White | Deacon | Player | Emerald Age | https://irishbaseball.org/bios/deacon-white-county-armagh/ | 12/2/1847 | Armagh |
| White | Wil | Player | Emerald Age | https://irishbaseball.org/bios/wil-white-county-armagh/ | 10/11/1854 | Armagh |
| Wilhelm | Hoyt | Player | Modern Era | https://irishbaseball.org/bios/hoyt-wilhelm-county-cork/ | 7/26/1922 | Cork |
| Williams | Ted | Player | Modern Era | https://irishbaseball.org/bios/ted-williams-county-cork/ | 8/30/1918 | Cork |
| Wills | Dave | Media | Modern Era | https://irishbaseball.org/bios/dave-wills-county-limerick/ | 3/13/1964 | Limerick |
| Yastrzemski | Mike | Player | Modern Era | https://irishbaseball.org/bios/mike-yastrzemski-county-kerry/ | 8/23/1990 | Kerry |
| Yost | Eddie | Player | Modern Era | https://irishbaseball.org/bios/eddie-yost-county-donegal/ | 10/13/1926 | Donegal |
| Zimmerman | Ryan | Player | Modern Era | https://irishbaseball.org/bios/ryan-zimmerman-county-dublin/ | 9/28/1984 | Dublin |
