Joseph J. Sullivan | |
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| Born | November 2, 1870 Boston, Massachusetts, U.S. |
| Died | April 6, 1949 (aged 78) ,Sharon, Massachusetts |
| Nationality | American |
| Other names | Sport Sullivan |
| Occupation | Gambler |
| Known for | Black Sox Scandal |
Joseph J. "Sport" Sullivan (November 2, 1870 – April 6, 1949) was an American bookmaker and gambler from Boston, Massachusetts who helped to initiate the 1919 Black Sox Scandal.