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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dan Jackson | 2059-2061 | 8 | 6 | .571 | 3.64 | 54 | 12 | 0 | 0 | 7 | 118.2 | 100 | 48 | 10 | 37 | 98 |
| Eric Jackson | 2055-2062 | 9 | 8 | .529 | 3.88 | 30 | 27 | 0 | 0 | 0 | 132.1 | 138 | 57 | 13 | 42 | 98 |
| Gabe James | 2062-2065 | 7 | 8 | .467 | 3.25 | 113 | 0 | 0 | 0 | 56 | 133.0 | 110 | 48 | 17 | 26 | 150 |
| Mitchell Jarratt | 2062-2065 | 1 | 7 | .125 | 6.03 | 26 | 4 | 1 | 0 | 0 | 65.2 | 76 | 44 | 9 | 17 | 60 |
| Dan Jarrett | 2056-2065 | 13 | 20 | .394 | 3.94 | 85 | 35 | 2 | 0 | 3 | 267.1 | 237 | 117 | 26 | 123 | 263 |
| Tom Jarvis | 2065-2065 | 3 | 4 | .429 | 5.80 | 15 | 9 | 0 | 0 | 1 | 63.2 | 67 | 41 | 13 | 22 | 57 |
| Louis Jeffery | 2052-2064 | 44 | 48 | .478 | 4.49 | 247 | 124 | 1 | 0 | 14 | 875.0 | 910 | 437 | 81 | 341 | 625 |
| Mike Jeffrey | 2061-2065 | 11 | 16 | .407 | 5.14 | 54 | 29 | 0 | 0 | 0 | 192.2 | 190 | 110 | 12 | 114 | 143 |
| Ken Jenkins | 2057-2059 | 6 | 12 | .333 | 3.68 | 92 | 0 | 0 | 0 | 41 | 102.2 | 102 | 42 | 8 | 25 | 88 |
| Pierre Ji | 2064-2065 | 1 | 0 | 1.000 | 5.89 | 11 | 0 | 0 | 0 | 1 | 18.1 | 18 | 12 | 4 | 12 | 23 |
| Gertjan Johnson | 2052-2052 | 0 | 1 | .000 | 16.20 | 1 | 0 | 0 | 0 | 0 | 1.2 | 3 | 3 | 0 | 2 | 3 |
| Mike Johnson | 2055-2057 | 3 | 4 | .429 | 5.57 | 27 | 6 | 0 | 0 | 0 | 64.2 | 76 | 40 | 10 | 14 | 60 |
| Jim Joly | 2061-2063 | 3 | 3 | .500 | 3.15 | 13 | 12 | 0 | 0 | 0 | 71.1 | 57 | 25 | 7 | 33 | 47 |
| Bob Jones | 2060-2064 | 21 | 33 | .389 | 3.99 | 163 | 38 | 1 | 0 | 67 | 388.1 | 390 | 172 | 40 | 124 | 438 |
| Jeff Jones | 2063-2063 | 0 | 0 | .000 | 18.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 4 | 2 | 0 | 0 | 1 |
| Nelson Juárez | 2065-2065 | 4 | 7 | .364 | 3.59 | 29 | 7 | 1 | 1 | 0 | 77.2 | 97 | 31 | 8 | 9 | 55 |
