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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 |
|---|---|---|---|---|---|---|---|---|---|
| Kai Jacks | 1955-1955 | .308 | 2 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Sylvain James | 1953-1953 | .000 | 0 | 0 | 6 | 5 | 0 | 5.56 | 51 |
| Mirko Janda | 1955-1955 | .000 | 0 | 0 | 1 | 1 | 0 | 4.46 | 16 |
| Juan Jaramillo | 1954-1954 | .000 | 0 | 0 | 6 | 12 | 0 | 6.54 | 62 |
| Sung-min Jeon | 1953-1953 | .000 | 0 | 0 | 2 | 6 | 11 | 4.94 | 33 |
| Marshall Jessop | 1952-1954 | .000 | 0 | 0 | 13 | 16 | 0 | 5.41 | 152 |
| Stevan Jigovic | 1955-1955 | .000 | 0 | 0 | 0 | 1 | 0 | 7.84 | 5 |
| Alfredo Jimenez | 1952-1954 | .321 | 4 | 35 | 0 | 0 | 0 | 0.00 | 0 |
| Danny Jimenez | 1955-1955 | .317 | 2 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| Jorge Jimenez | 1952-1953 | .288 | 4 | 38 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Johnson | 1955-1955 | .000 | 0 | 0 | 0 | 1 | 0 | 72.00 | 0 |
| Steve Johnson | 1952-1954 | .334 | 5 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| Bruno Jolivet | 1955-1955 | .500 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Bob Jorgensen | 1955-1955 | .000 | 0 | 0 | 1 | 1 | 1 | 3.86 | 9 |
| Logan Joseph | 1953-1955 | .274 | 4 | 20 | 0 | 0 | 0 | 0.00 | 0 |
| Zivota Jovic | 1955-1955 | .270 | 5 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Zenel Julia | 1953-1953 | .264 | 4 | 28 | 0 | 0 | 0 | 0.00 | 0 |
| Matt Julian | 1953-1953 | .200 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
