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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 |
|---|---|---|---|---|---|---|---|---|---|
| Frank Jackson | 2016-2016 | .000 | 0 | 0 | 1 | 0 | 1 | 1.46 | 12 |
| Leroy Jackson | 2016-2017 | .000 | 0 | 0 | 4 | 4 | 0 | 7.35 | 72 |
| Justin Jamerson | 2015-2015 | .000 | 0 | 0 | 0 | 0 | 0 | 5.00 | 11 |
| Cal James | 2016-2017 | .284 | 7 | 42 | 0 | 0 | 0 | 0.00 | 0 |
| Leonard James | 2017-2017 | .114 | 1 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Wallace James | 2015-2016 | .336 | 8 | 52 | 0 | 0 | 0 | 0.00 | 0 |
| Gerd Jans | 2015-2016 | .000 | 0 | 0 | 2 | 6 | 7 | 6.39 | 63 |
| Raśl Javier | 2015-2015 | .000 | 0 | 0 | 3 | 0 | 0 | 6.29 | 28 |
| William Jefferson | 2016-2017 | .278 | 6 | 27 | 0 | 0 | 0 | 0.00 | 0 |
| Rudy Jenkins | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Bill Jensen | 2013-2016 | .000 | 0 | 0 | 1 | 0 | 0 | 7.50 | 24 |
| Mitch Jensen | 2016-2017 | .291 | 15 | 64 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Johnson | 2016-2016 | .000 | 0 | 0 | 2 | 2 | 0 | 4.91 | 39 |
| Denver Johnston | 2017-2017 | .000 | 0 | 0 | 1 | 0 | 0 | 0.00 | 1 |
| Pat Johnston | 2016-2017 | .391 | 0 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Gary Jones | 2016-2016 | .000 | 0 | 0 | 0 | 0 | 0 | 6.75 | 0 |
| Kip Jones | 2016-2016 | .360 | 1 | 3 | 0 | 0 | 0 | 0.00 | 0 |
