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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
|---|---|---|---|---|---|---|---|---|---|
| Fred Jacklitsch | 1900-1910 | .249 | 3 | 87 | 0 | 0 | 0 | 0.00 | 0 |
| Ashes Jackson | 1909-1911 | .230 | 2 | 135 | 0 | 0 | 0 | 0.00 | 0 |
| George Jackson | 1911-1911 | .298 | 0 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Herbert Jackson | 1905-1905 | .250 | 0 | 0 | 0 | 0 | 0 | 3.60 | 2 |
| Jim Jackson | 1901-1906 | .185 | 0 | 27 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Jackson | 1908-1911 | .331 | 11 | 238 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Jacobs | 1902-1902 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Beany Jacobson | 1904-1907 | .146 | 1 | 20 | 36 | 67 | 0 | 3.44 | 332 |
| Charlie Jaeger | 1904-1904 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Bert James | 1909-1909 | .500 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Bill James | 1911-1911 | .000 | 0 | 0 | 0 | 0 | 0 | 2.45 | 2 |
| Ray Jansen | 1910-1910 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Hal Janvrin | 1911-1911 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Hughie Jennings | 1891-1911 | .296 | 16 | 944 | 0 | 1 | 0 | 5.40 | 0 |
| Charlie Johnson | 1908-1908 | .250 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Grant Johnson | 1895-1911 | .279 | 40 | 969 | 0 | 0 | 0 | 0.00 | 0 |
| Otis Johnson | 1911-1911 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Tom Johnson | 1911-1911 | .135 | 0 | 9 | 11 | 23 | 0 | 4.37 | 93 |
| Walter Johnson | 1907-1911 | .148 | 3 | 41 | 93 | 88 | 0 | 2.50 | 1027 |
| Doc Johnston | 1910-1910 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Jimmy Johnston | 1911-1911 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Alex Jones | 1889-1894 | .173 | 0 | 5 | 7 | 14 | 0 | 3.33 | 63 |
| Bill Jones | 1911-1911 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Charlie Jones | 1901-1908 | .209 | 3 | 60 | 0 | 0 | 0 | 0.00 | 0 |
| Cowboy Jones | 1898-1901 | .158 | 0 | 8 | 25 | 29 | 2 | 3.36 | 126 |
| Davy Jones | 1901-1911 | .263 | 8 | 383 | 0 | 0 | 0 | 0.00 | 0 |
| Elijah Jones | 1909-1909 | .000 | 0 | 0 | 0 | 0 | 0 | 7.71 | 0 |
| Fielder Jones | 1896-1908 | .280 | 19 | 652 | 0 | 0 | 0 | 0.00 | 0 |
| Jim Jones | 1897-1902 | .225 | 0 | 58 | 0 | 0 | 0 | 18.90 | 0 |
| Oscar Jones | 1903-1905 | .212 | 0 | 28 | 35 | 69 | 1 | 4.13 | 262 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Tom Jones | 1902-1910 | .237 | 2 | 49 | 0 | 0 | 0 | 0.00 | 0 |
| Dutch Jordan | 1903-1904 | .200 | 0 | 11 | 0 | 0 | 0 | 0.00 | 0 |
| Slats Jordan | 1901-1902 | .053 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Tim Jordan | 1901-1910 | .235 | 54 | 457 | 0 | 0 | 0 | 0.00 | 0 |
| Addie Joss | 1902-1910 | .166 | 2 | 86 | 217 | 110 | 6 | 1.96 | 1113 |
| Frank Jude | 1906-1906 | .444 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Jose Junco | 1911-1911 | .000 | 0 | 0 | 0 | 0 | 0 | 5.40 | 0 |
