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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 |
|---|---|---|---|---|---|---|---|---|---|
| Greg Jacknewitz | 2018-2019 | .000 | 0 | 0 | 1 | 3 | 0 | 10.41 | 9 |
| Drew Jackson | 2019-2022 | .272 | 31 | 146 | 0 | 0 | 0 | 17.18 | 3 |
| Jay Jackson | 2022-2022 | .000 | 0 | 0 | 3 | 2 | 0 | 9.15 | 19 |
| Luke Jackson | 2015-2017 | .000 | 0 | 0 | 6 | 4 | 0 | 6.03 | 74 |
| Ryan Jackson | 2014-2014 | .372 | 14 | 61 | 0 | 0 | 0 | 0.00 | 0 |
| Zach Jackson | 2021-2023 | .000 | 0 | 0 | 6 | 2 | 14 | 5.48 | 36 |
| David Jacob | 2019-2023 | .259 | 5 | 26 | 0 | 0 | 0 | 0.00 | 0 |
| Jared James | 2018-2018 | .250 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Josh James | 2022-2023 | .000 | 0 | 0 | 3 | 0 | 1 | 3.18 | 37 |
| Jordan Jankowski | 2018-2018 | .000 | 0 | 0 | 3 | 2 | 1 | 6.00 | 39 |
| Travis Jankowski | 2016-2023 | .289 | 38 | 242 | 0 | 0 | 0 | 0.00 | 0 |
| Mickey Jannis | 2016-2016 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 2 |
| Tyler Jay | 2018-2018 | .000 | 0 | 0 | 0 | 0 | 0 | 4.41 | 17 |
| Myles Jaye | 2017-2017 | .000 | 0 | 0 | 4 | 4 | 0 | 7.40 | 44 |
| Luis Jean | 2019-2019 | .385 | 1 | 4 | 0 | 0 | 0 | 0.00 | 0 |
| Greyson Jenista | 2022-2022 | .239 | 24 | 78 | 0 | 0 | 0 | 0.00 | 0 |
| Jesse Jenner | 2022-2022 | .306 | 8 | 43 | 0 | 0 | 0 | 0.00 | 0 |
| Dan Jennings | 2014-2021 | .000 | 0 | 0 | 12 | 11 | 42 | 4.46 | 135 |
| Desmond Jennings | 2017-2017 | .304 | 5 | 33 | 0 | 0 | 0 | 0.00 | 0 |
| Chase Jensen | 2014-2015 | .237 | 8 | 48 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Jepsen | 2016-2016 | .000 | 0 | 0 | 0 | 0 | 0 | 2.70 | 5 |
| Williams Jerez | 2018-2018 | .000 | 0 | 0 | 0 | 1 | 0 | 6.46 | 16 |
| A.J. Jimenez | 2018-2019 | .325 | 10 | 54 | 0 | 0 | 0 | 13.50 | 0 |
| Eloy Jimenez | 2017-2019 | .389 | 37 | 119 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Jimenez | 2018-2019 | .000 | 0 | 0 | 1 | 1 | 1 | 3.29 | 18 |
| Luis Jimenez | 2013-2013 | .281 | 5 | 38 | 0 | 0 | 0 | 0.00 | 0 |
| Connor Joe | 2020-2020 | .331 | 29 | 106 | 0 | 0 | 0 | 0.00 | 0 |
| Brian Johnson | 2018-2023 | .000 | 0 | 0 | 15 | 16 | 2 | 5.28 | 184 |
| Chase Johnson | 2020-2023 | .000 | 0 | 0 | 14 | 17 | 2 | 4.90 | 201 |
| Chris Johnson | 2013-2014 | .340 | 18 | 86 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Erik Johnson | 2015-2017 | .000 | 0 | 0 | 20 | 10 | 3 | 5.58 | 232 |
| Jeff Johnson | 2015-2015 | .000 | 0 | 0 | 1 | 2 | 0 | 5.18 | 14 |
| Jim Johnson | 2016-2016 | .000 | 0 | 0 | 3 | 1 | 2 | 4.72 | 40 |
| Micah Johnson | 2018-2018 | .269 | 15 | 78 | 0 | 0 | 0 | 0.00 | 0 |
| Michael Johnson | 2018-2021 | .000 | 0 | 0 | 6 | 8 | 6 | 4.92 | 132 |
| Pierce Johnson | 2016-2020 | .000 | 0 | 0 | 10 | 5 | 9 | 5.38 | 109 |
| Sherman Johnson | 2018-2022 | .228 | 3 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| Chase Johnson-Mullins | 2018-2018 | .000 | 0 | 0 | 0 | 1 | 0 | 6.75 | 3 |
| Connor Johnstone | 2023-2023 | .000 | 0 | 0 | 0 | 3 | 2 | 6.02 | 29 |
| Chris Jones | 2016-2016 | .000 | 0 | 0 | 1 | 1 | 0 | 5.00 | 16 |
| Damon Jones | 2020-2023 | .000 | 0 | 0 | 4 | 9 | 0 | 5.56 | 127 |
| Garrett Jones | 2016-2016 | .236 | 10 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Greg Jones | 2023-2023 | .287 | 16 | 56 | 0 | 0 | 0 | 0.00 | 0 |
| James Jones | 2015-2015 | .317 | 2 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| John Jones | 2019-2019 | .348 | 1 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Mycal Jones | 2013-2016 | .265 | 14 | 127 | 0 | 0 | 0 | 0.00 | 0 |
| Nate Jones | 2013-2014 | .000 | 0 | 0 | 8 | 13 | 9 | 6.00 | 124 |
| Ryder Jones | 2018-2018 | .200 | 1 | 3 | 0 | 0 | 0 | 0.00 | 0 |
| Spencer Jones | 2021-2021 | .000 | 0 | 0 | 1 | 0 | 7 | 4.70 | 14 |
| Taylor Jones | 2020-2021 | .292 | 58 | 196 | 0 | 0 | 0 | 0.00 | 0 |
| Taylor Jordan | 2014-2017 | .000 | 0 | 0 | 14 | 23 | 1 | 5.00 | 202 |
| Felix Jorge | 2017-2020 | .000 | 0 | 0 | 19 | 20 | 0 | 5.29 | 137 |
| Corban Joseph | 2017-2019 | .330 | 26 | 135 | 0 | 0 | 0 | 0.00 | 0 |
| Tommy Joseph | 2015-2019 | .306 | 43 | 166 | 0 | 0 | 0 | 0.00 | 0 |
| Matt Joyce | 2018-2019 | .293 | 10 | 32 | 0 | 0 | 0 | 0.00 | 0 |
| Hayden Juenger | 2021-2021 | .000 | 0 | 0 | 2 | 0 | 0 | 2.70 | 34 |
| Taylor Jungmann | 2016-2016 | .000 | 0 | 0 | 8 | 4 | 0 | 4.14 | 92 |
| Janson Junk | 2022-2023 | .000 | 0 | 0 | 10 | 11 | 4 | 5.33 | 113 |
| Ariel Jurado | 2017-2021 | .000 | 0 | 0 | 8 | 10 | 1 | 4.65 | 85 |
