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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 |
|---|---|---|---|---|---|---|---|---|---|
| Kent Jackson | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Jackson | 2018-2018 | .300 | 0 | 3 | 0 | 0 | 0 | 0.00 | 0 |
| Russell Jackson | 2019-2019 | .159 | 3 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Augusto Jaramillo | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Juan Jaramillo | 2014-2014 | .170 | 0 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Raúl Javier | 2014-2014 | .000 | 0 | 0 | 4 | 7 | 2 | 10.16 | 32 |
| Rudy Jedburgh | 2013-2016 | .216 | 6 | 45 | 0 | 0 | 0 | 0.00 | 0 |
| Jared Jefferson | 2021-2021 | .230 | 5 | 15 | 0 | 0 | 0 | 0.00 | 0 |
| Gil Jenkins | 2016-2020 | .234 | 7 | 45 | 0 | 0 | 0 | 0.00 | 0 |
| Bill Jensen | 2018-2018 | .000 | 0 | 0 | 0 | 3 | 0 | 8.74 | 26 |
| Mitch Jensen | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Ares Jilavian | 2015-2015 | .224 | 2 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Félix Jiménez | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Mario Jiménez | 2014-2014 | .333 | 0 | 0 | 4 | 3 | 0 | 9.61 | 30 |
| Chris Johnson | 2013-2013 | .286 | 1 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Gregory Johnson | 2020-2021 | .257 | 2 | 47 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Johnson | 2018-2018 | .091 | 0 | 0 | 2 | 4 | 0 | 5.43 | 37 |
| Myron Johnson | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| William Johnson | 2013-2018 | .188 | 0 | 10 | 27 | 27 | 0 | 3.62 | 405 |
| Anthony Johnston | 2020-2021 | .279 | 6 | 40 | 0 | 0 | 0 | 0.00 | 0 |
| Denver Johnston | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Phil Johnston | 2017-2021 | .224 | 6 | 64 | 0 | 0 | 0 | 0.00 | 0 |
| Walt Johnston | 2020-2021 | .115 | 0 | 1 | 12 | 6 | 3 | 5.28 | 91 |
| Sylvain Jolly | 2018-2021 | .000 | 0 | 0 | 13 | 11 | 29 | 2.88 | 111 |
| Gary Jones | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Harrison Jones | 2021-2021 | .000 | 0 | 0 | 9 | 15 | 0 | 4.71 | 102 |
| Henry Jones | 2021-2021 | .231 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Joey Jones | 2021-2021 | .279 | 13 | 50 | 0 | 0 | 0 | 0.00 | 0 |
| John Jones | 2013-2015 | .000 | 0 | 0 | 0 | 2 | 0 | 7.24 | 9 |
| Kip Jones | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Mike Jones | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Robert Jones | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Rod Jones | 2020-2021 | .213 | 1 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Tom Jones | 2015-2015 | .167 | 0 | 0 | 1 | 1 | 0 | 5.50 | 20 |
| Tommy Jones | 2018-2021 | .336 | 32 | 225 | 0 | 0 | 0 | 0.00 | 0 |
| Charles Jordan | 2017-2021 | .249 | 0 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Greg Jordan | 2018-2019 | .000 | 0 | 0 | 1 | 3 | 0 | 3.86 | 25 |
| Johnny Joyce | 2013-2014 | .000 | 0 | 0 | 1 | 6 | 0 | 8.10 | 49 |
| Juan Júlio | 2013-2021 | .165 | 1 | 25 | 63 | 56 | 3 | 3.28 | 775 |
