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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alec Jackson | 0-3 | 6 | 2 | .750 | 3.10 | 67 | 0 | 0 | 0 | 1 | 95.2 | 90 | 33 | 7 | 22 | 80 |
| Ben Jackson | 1-2024 | 3 | 1 | .750 | 4.25 | 35 | 5 | 0 | 0 | 1 | 84.2 | 75 | 40 | 9 | 32 | 72 |
| John Jackson | 2-2025 | 19 | 11 | .633 | 3.95 | 42 | 42 | 3 | 1 | 0 | 262.1 | 269 | 115 | 13 | 73 | 193 |
| Kevin Jackson | 4-2019 | 17 | 9 | .654 | 2.76 | 49 | 27 | 6 | 3 | 0 | 228.2 | 227 | 70 | 18 | 53 | 169 |
| Ron Jamison | 0-3 | 1 | 0 | 1.000 | 4.81 | 10 | 0 | 0 | 0 | 0 | 24.1 | 26 | 13 | 2 | 14 | 14 |
| Miguel Jaramillo | 0-2031 | 2 | 4 | .333 | 9.07 | 12 | 8 | 0 | 0 | 0 | 41.2 | 48 | 42 | 3 | 26 | 38 |
| Tim Jefferies | 0-3 | 2 | 1 | .667 | 3.16 | 27 | 0 | 0 | 0 | 2 | 51.1 | 56 | 18 | 1 | 19 | 42 |
| Bob Jefferson | 1-0 | 10 | 4 | .714 | 3.00 | 59 | 4 | 0 | 0 | 2 | 111.0 | 104 | 37 | 7 | 45 | 105 |
| Tim Jefferson | 3-2030 | 17 | 22 | .436 | 4.88 | 112 | 53 | 0 | 0 | 1 | 370.1 | 420 | 201 | 40 | 152 | 275 |
| Greg Jenkins | 1-2025 | 8 | 10 | .444 | 3.83 | 29 | 29 | 0 | 0 | 0 | 190.1 | 196 | 81 | 5 | 53 | 157 |
| Mike Jenkins | -1-3 | 10 | 12 | .455 | 4.39 | 111 | 0 | 0 | 0 | 53 | 104.2 | 120 | 51 | 13 | 52 | 52 |
| Ron Jenkins | 1-0 | 14 | 7 | .667 | 4.27 | 222 | 0 | 0 | 0 | 5 | 257.1 | 278 | 122 | 22 | 129 | 215 |
| Kei-thing Jiu | 0-0 | 1 | 1 | .500 | 5.97 | 14 | 1 | 0 | 0 | 1 | 37.2 | 43 | 25 | 2 | 25 | 21 |
| Cullen Jones | 0-2022 | 3 | 3 | .500 | 2.83 | 10 | 10 | 0 | 0 | 0 | 63.2 | 62 | 20 | 2 | 16 | 46 |
| Don Jones | 0-3 | 0 | 0 | .000 | 13.50 | 1 | 0 | 0 | 0 | 0 | 0.2 | 2 | 1 | 0 | 0 | 1 |
| Fred Jones | 0-2020 | 1 | 2 | .333 | 3.25 | 18 | 0 | 0 | 0 | 2 | 36.0 | 32 | 13 | 0 | 17 | 24 |
| Glenn Jones | 0-2029 | 7 | 7 | .500 | 3.79 | 92 | 0 | 0 | 0 | 50 | 95.0 | 115 | 40 | 7 | 32 | 42 |
| Jason Jones | 5-3 | 29 | 27 | .518 | 3.95 | 106 | 73 | 1 | 0 | 1 | 485.1 | 479 | 213 | 39 | 175 | 415 |
| Mike Jones | 0-2031 | 1 | 2 | .333 | 5.20 | 9 | 3 | 0 | 0 | 0 | 27.2 | 28 | 16 | 1 | 13 | 25 |
| Victor Jones | 0-3 | 3 | 3 | .500 | 3.71 | 58 | 0 | 0 | 0 | 3 | 53.1 | 46 | 22 | 0 | 21 | 54 |
| Collin Jordan | -1-2031 | 8 | 6 | .571 | 5.40 | 66 | 0 | 0 | 0 | 4 | 65.0 | 77 | 39 | 11 | 30 | 57 |
| Salvador Jordan | 2-2022 | 4 | 6 | .400 | 2.71 | 14 | 8 | 1 | 0 | 0 | 76.1 | 85 | 23 | 1 | 12 | 51 |
| John Joseph | 0-0 | 5 | 11 | .312 | 7.71 | 55 | 12 | 0 | 0 | 0 | 141.1 | 198 | 121 | 18 | 90 | 65 |
| Kevin Joseph | 0-2025 | 16 | 10 | .615 | 3.54 | 84 | 28 | 2 | 1 | 3 | 252.0 | 272 | 99 | 20 | 79 | 149 |
| Dennis Joyce | 0-0 | 0 | 0 | .000 | 0.00 | 5 | 0 | 0 | 0 | 0 | 5.0 | 4 | 0 | 0 | 5 | 2 |
