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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 |
|---|---|---|---|---|---|---|---|---|---|
| Jason Jackson | 2017-2018 | .000 | 0 | 0 | 11 | 9 | 0 | 6.22 | 164 |
| Kent Jackson | 2017-2019 | .313 | 21 | 73 | 0 | 0 | 0 | 0.00 | 0 |
| Russell Jackson | 2017-2018 | .282 | 24 | 85 | 0 | 0 | 0 | 0.00 | 0 |
| Wilbur James | 2020-2020 | .235 | 3 | 32 | 0 | 0 | 0 | 0.00 | 0 |
| Gerd Jans | 2017-2019 | .000 | 0 | 0 | 10 | 7 | 2 | 7.39 | 118 |
| Gil Jenkins | 2015-2016 | .330 | 17 | 43 | 0 | 0 | 0 | 0.00 | 0 |
| John Jenkins | 2020-2020 | .270 | 8 | 50 | 0 | 0 | 0 | 0.00 | 0 |
| Jon Jenkins | 2017-2017 | .292 | 0 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Bill Jensen | 2017-2017 | .000 | 0 | 0 | 0 | 1 | 1 | 6.75 | 12 |
| Edward Jensen | 2015-2020 | .000 | 0 | 0 | 2 | 8 | 1 | 10.76 | 26 |
| Gregory Johnson | 2019-2019 | .364 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Johnson | 2017-2020 | .000 | 0 | 0 | 4 | 6 | 0 | 6.63 | 50 |
| Myron Johnson | 2020-2020 | .000 | 0 | 0 | 2 | 8 | 0 | 7.68 | 32 |
| Paul Johnson | 2018-2018 | .268 | 2 | 14 | 0 | 0 | 0 | 0.00 | 0 |
| Rick Johnson | 2018-2018 | .357 | 8 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Anthony Johnston | 2019-2019 | .306 | 1 | 25 | 0 | 0 | 0 | 0.00 | 0 |
| Denver Johnston | 2015-2019 | .000 | 0 | 0 | 6 | 8 | 1 | 7.23 | 74 |
| Jim Johnstone | 2017-2019 | .000 | 0 | 0 | 10 | 23 | 1 | 7.14 | 152 |
| Steven Johnstone | 2015-2019 | .321 | 4 | 27 | 0 | 0 | 0 | 0.00 | 0 |
| Ethan Jollymour | 2020-2020 | 1.000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Gary Jones | 2019-2019 | .000 | 0 | 0 | 1 | 0 | 3 | 4.43 | 12 |
| Harrison Jones | 2020-2020 | .000 | 0 | 0 | 5 | 0 | 0 | 2.37 | 48 |
| Henry Jones | 2018-2020 | .234 | 4 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Leonard Jones | 2015-2018 | .278 | 16 | 62 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Jones | 2015-2015 | .000 | 0 | 0 | 0 | 0 | 0 | 4.50 | 10 |
| Charles Jordan | 2020-2020 | .284 | 0 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Miguel Juárez | 2020-2020 | .250 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
