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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jason Jackson | 2019-2019 | 1 | 1 | .500 | 6.14 | 22 | 0 | 0 | 0 | 0 | 36.2 | 43 | 25 | 6 | 16 | 38 |
| Leroy Jackson | 2017-2018 | 4 | 11 | .267 | 6.15 | 21 | 19 | 1 | 0 | 0 | 98.0 | 101 | 67 | 16 | 57 | 110 |
| Ed Jacobs | 2018-2020 | 12 | 7 | .632 | 3.10 | 51 | 13 | 4 | 1 | 4 | 139.1 | 136 | 48 | 9 | 64 | 95 |
| Justin Jamerson | 2015-2019 | 12 | 11 | .522 | 6.18 | 105 | 18 | 0 | 0 | 5 | 201.0 | 245 | 138 | 29 | 89 | 183 |
| Gerd Jans | 2015-2015 | 1 | 1 | .500 | 6.06 | 9 | 0 | 0 | 0 | 0 | 16.1 | 20 | 11 | 1 | 9 | 13 |
| Raśl Javier | 2015-2016 | 1 | 0 | 1.000 | 4.30 | 13 | 0 | 0 | 0 | 0 | 23.0 | 30 | 11 | 3 | 9 | 18 |
| Rudy Jenkins | 2019-2020 | 9 | 11 | .450 | 3.25 | 40 | 30 | 0 | 0 | 0 | 196.1 | 189 | 71 | 21 | 85 | 201 |
| Franklin Johnson | 2015-2018 | 6 | 5 | .545 | 6.16 | 106 | 0 | 0 | 0 | 14 | 125.2 | 189 | 86 | 22 | 51 | 112 |
| Jim Johnstone | 2020-2020 | 0 | 1 | .000 | 12.15 | 3 | 0 | 0 | 0 | 0 | 6.2 | 12 | 9 | 2 | 7 | 5 |
| Gary Jones | 2015-2015 | 0 | 0 | .000 | 0.00 | 2 | 0 | 0 | 0 | 0 | 3.0 | 1 | 0 | 0 | 0 | 4 |
| Steven Jones | 2019-2020 | 0 | 0 | .000 | 1.59 | 9 | 0 | 0 | 0 | 1 | 17.0 | 12 | 3 | 2 | 6 | 15 |
| Teddy Jones | 2017-2019 | 17 | 18 | .486 | 4.54 | 69 | 43 | 2 | 0 | 5 | 291.1 | 293 | 147 | 27 | 127 | 310 |
