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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 | 1955-1956 | .268 | 5 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Jack Jacobs | 1954-1956 | .323 | 15 | 41 | 0 | 0 | 0 | 0.00 | 0 |
| Yuri Janssen | 1952-1958 | .230 | 1 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Hervé Jean | 1958-1959 | .308 | 5 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Marshall Jessop | 1955-1956 | .000 | 0 | 0 | 1 | 0 | 3 | 8.62 | 30 |
| Jimmy Jewett | 1953-1953 | .423 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Stevan Jigovic | 1957-1957 | .000 | 0 | 0 | 0 | 0 | 1 | 5.08 | 19 |
| Alfredo Jimenez | 1954-1955 | .339 | 4 | 36 | 0 | 0 | 0 | 0.00 | 0 |
| Jorge Jimenez | 1954-1956 | .320 | 4 | 46 | 0 | 0 | 0 | 0.00 | 0 |
| Mark Johnson | 1957-1958 | .272 | 6 | 27 | 0 | 0 | 0 | 0.00 | 0 |
| Norm Johnson | 1954-1955 | .000 | 0 | 0 | 0 | 0 | 0 | 4.72 | 14 |
| Steve Johnson | 1954-1958 | .302 | 4 | 38 | 0 | 0 | 0 | 0.00 | 0 |
| James Johnston | 1957-1957 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Jared Johnston | 1957-1959 | .319 | 13 | 68 | 0 | 0 | 0 | 0.00 | 0 |
| Bruno Jolivet | 1958-1958 | .263 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Hughie Jones | 1952-1957 | .250 | 45 | 154 | 0 | 0 | 0 | 0.00 | 0 |
| Zier Jonkers | 1952-1953 | .000 | 0 | 0 | 1 | 1 | 0 | 4.23 | 35 |
| Bob Jorgensen | 1956-1956 | .000 | 0 | 0 | 0 | 1 | 1 | 2.00 | 12 |
| Zenel Julia | 1954-1957 | .302 | 4 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Jin-hwan Jung | 1952-1954 | .248 | 5 | 34 | 0 | 0 | 0 | 0.00 | 0 |
