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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Will Jackson | 1888-1888 | 1 | 0 | 1.000 | 1.69 | 3 | 0 | 0 | 0 | 0 | 5.1 | 4 | 1 | 0 | 1 | 4 |
| Walt James | 1886-1887 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 2.2 | 2 | 0 | 0 | 2 | 2 |
| Ed Jarrell | 1884-1886 | 0 | 0 | .000 | 0.00 | 3 | 0 | 0 | 0 | 0 | 2.2 | 2 | 0 | 0 | 0 | 0 |
| Frank Jean | 1889-1889 | 1 | 0 | 1.000 | 5.22 | 20 | 0 | 0 | 0 | 4 | 29.1 | 34 | 17 | 0 | 18 | 4 |
| Arthur Jones | 1889-1889 | 11 | 9 | .550 | 3.50 | 47 | 18 | 9 | 0 | 0 | 200.2 | 247 | 78 | 7 | 57 | 67 |
| Bill Jones | 1886-1887 | 0 | 3 | .000 | 2.00 | 42 | 0 | 0 | 0 | 2 | 90.0 | 72 | 20 | 3 | 23 | 45 |
| Henry Jones | 1882-1882 | 0 | 0 | .000 | 2.35 | 14 | 0 | 0 | 0 | 1 | 23.0 | 19 | 6 | 3 | 9 | 10 |
| Sid Jones | 1882-1882 | 0 | 0 | .000 | 4.50 | 1 | 0 | 0 | 0 | 0 | 2.0 | 4 | 1 | 0 | 2 | 1 |
| Thomas Jorden | 1889-1889 | 0 | 0 | .000 | 4.50 | 1 | 0 | 0 | 0 | 0 | 2.0 | 3 | 1 | 0 | 0 | 0 |
| Hank Jung | 1888-1890 | 33 | 33 | .500 | 2.94 | 99 | 70 | 50 | 1 | 2 | 631.1 | 658 | 206 | 18 | 149 | 234 |
