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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Andre Jackson | 2021-2021 | 3 | 2 | .600 | 3.00 | 12 | 12 | 0 | 0 | 0 | 54.0 | 38 | 18 | 1 | 29 | 64 |
| Kris Jackson | 2020-2020 | 0 | 0 | .000 | 0.00 | 2 | 0 | 0 | 0 | 0 | 2.2 | 5 | 0 | 0 | 3 | 3 |
| Alek Jacob | 2022-2023 | 1 | 1 | .500 | 4.35 | 2 | 2 | 0 | 0 | 0 | 10.1 | 12 | 5 | 1 | 2 | 6 |
| Joe Jacques | 2020-2023 | 11 | 3 | .786 | 3.36 | 115 | 0 | 0 | 0 | 13 | 155.1 | 143 | 58 | 13 | 68 | 143 |
| Christian James | 2019-2019 | 3 | 5 | .375 | 3.43 | 33 | 0 | 0 | 0 | 4 | 57.2 | 59 | 22 | 5 | 34 | 41 |
| Daniel James | 2020-2020 | 0 | 2 | .000 | 7.96 | 16 | 2 | 0 | 0 | 0 | 26.0 | 34 | 23 | 4 | 17 | 25 |
| Jared Janczak | 2020-2023 | 6 | 5 | .545 | 6.40 | 35 | 13 | 0 | 0 | 0 | 102.2 | 114 | 73 | 17 | 64 | 92 |
| Mickey Jannis | 2020-2020 | 0 | 1 | .000 | 3.00 | 5 | 0 | 0 | 0 | 0 | 15.0 | 20 | 5 | 1 | 4 | 9 |
| Tyler Jay | 2019-2020 | 7 | 3 | .700 | 5.64 | 63 | 1 | 0 | 0 | 4 | 91.0 | 104 | 57 | 10 | 43 | 94 |
| Myles Jaye | 2013-2015 | 14 | 14 | .500 | 5.00 | 50 | 50 | 0 | 0 | 0 | 259.0 | 284 | 144 | 26 | 130 | 241 |
| Luis Jean | 2018-2020 | 0 | 0 | .000 | 148.50 | 2 | 0 | 0 | 0 | 0 | 0.2 | 10 | 11 | 2 | 0 | 0 |
| Trey Jeans | 2021-2023 | 14 | 3 | .824 | 3.92 | 52 | 13 | 0 | 0 | 2 | 144.2 | 112 | 63 | 16 | 90 | 146 |
| Daulton Jefferies | 2018-2018 | 4 | 0 | 1.000 | 4.20 | 6 | 6 | 0 | 0 | 0 | 30.0 | 26 | 14 | 6 | 10 | 26 |
| Chris Jensen | 2014-2017 | 6 | 10 | .375 | 4.25 | 30 | 30 | 0 | 0 | 0 | 156.2 | 148 | 74 | 20 | 58 | 183 |
| Williams Jerez | 2020-2021 | 0 | 2 | .000 | 9.00 | 3 | 0 | 0 | 0 | 0 | 4.0 | 7 | 4 | 1 | 1 | 4 |
| Jordan Jess | 2018-2018 | 1 | 2 | .333 | 6.75 | 13 | 0 | 0 | 0 | 0 | 16.0 | 28 | 12 | 2 | 6 | 18 |
| Jake Jewell | 2016-2017 | 7 | 6 | .538 | 5.21 | 74 | 12 | 0 | 0 | 6 | 155.1 | 152 | 90 | 17 | 72 | 156 |
| Johendi Jiminian | 2013-2014 | 10 | 12 | .455 | 5.31 | 35 | 29 | 1 | 1 | 0 | 164.1 | 184 | 97 | 18 | 98 | 145 |
| Jake Johansen | 2014-2016 | 5 | 10 | .333 | 6.66 | 26 | 24 | 0 | 0 | 0 | 102.2 | 126 | 76 | 24 | 58 | 122 |
| Chase Johnson | 2016-2020 | 38 | 25 | .603 | 4.55 | 151 | 96 | 0 | 0 | 5 | 564.1 | 568 | 285 | 67 | 233 | 526 |
| Jacob Johnson | 2013-2013 | 2 | 3 | .400 | 6.47 | 58 | 0 | 0 | 0 | 0 | 65.1 | 67 | 47 | 7 | 47 | 52 |
| Jared Johnson | 2020-2022 | 0 | 3 | .000 | 9.00 | 15 | 0 | 0 | 0 | 0 | 28.0 | 37 | 28 | 7 | 22 | 29 |
| Jordan Johnson | 2015-2015 | 0 | 0 | .000 | 2.45 | 2 | 0 | 0 | 0 | 0 | 3.2 | 3 | 1 | 0 | 0 | 2 |
| Kevin Johnson | 2014-2016 | 4 | 5 | .444 | 9.44 | 63 | 0 | 0 | 0 | 3 | 87.2 | 142 | 92 | 17 | 50 | 78 |
| MD Johnson | 2023-2023 | 1 | 2 | .333 | 5.65 | 8 | 8 | 0 | 0 | 0 | 36.2 | 29 | 23 | 4 | 16 | 30 |
| Trent Johnson | 2018-2018 | 0 | 0 | .000 | 8.31 | 3 | 0 | 0 | 0 | 0 | 4.1 | 4 | 4 | 0 | 3 | 5 |
| Tyler Johnson | 2019-2022 | 1 | 3 | .250 | 3.31 | 30 | 0 | 0 | 0 | 17 | 32.2 | 32 | 12 | 4 | 11 | 45 |
| Kyle Johnston | 2019-2022 | 25 | 33 | .431 | 4.98 | 95 | 90 | 0 | 0 | 0 | 473.2 | 511 | 262 | 51 | 226 | 382 |
| Reid Johnston | 2023-2023 | 5 | 7 | .417 | 5.27 | 26 | 22 | 0 | 0 | 0 | 114.1 | 133 | 67 | 18 | 60 | 97 |
| Eric Jokisch | 2014-2014 | 1 | 1 | .500 | 7.30 | 8 | 0 | 0 | 0 | 1 | 12.1 | 11 | 10 | 4 | 5 | 20 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Chris Jones | 2017-2017 | 11 | 3 | .786 | 4.06 | 31 | 16 | 0 | 0 | 2 | 133.0 | 122 | 60 | 17 | 77 | 121 |
| Cory Jones | 2018-2018 | 0 | 0 | .000 | 14.90 | 6 | 0 | 0 | 0 | 0 | 9.2 | 17 | 16 | 2 | 15 | 1 |
| Devin Jones | 2013-2013 | 3 | 0 | 1.000 | 2.20 | 10 | 5 | 0 | 0 | 3 | 41.0 | 23 | 10 | 4 | 20 | 27 |
| Jordan Jones | 2020-2020 | 0 | 2 | .000 | 6.86 | 9 | 1 | 0 | 0 | 1 | 19.2 | 20 | 15 | 2 | 15 | 17 |
| Spencer Jones | 2018-2019 | 2 | 1 | .667 | 1.80 | 9 | 0 | 0 | 0 | 1 | 15.0 | 8 | 3 | 1 | 7 | 17 |
| Tyler Jones | 2020-2021 | 13 | 9 | .591 | 3.50 | 103 | 7 | 0 | 0 | 2 | 175.0 | 159 | 68 | 12 | 112 | 145 |
| Brannon Jordan | 2023-2023 | 0 | 1 | .000 | 11.93 | 8 | 1 | 0 | 0 | 0 | 14.1 | 28 | 19 | 2 | 15 | 8 |
| Mitchell Jordan | 2020-2020 | 1 | 2 | .333 | 5.33 | 8 | 7 | 0 | 0 | 0 | 27.0 | 28 | 16 | 4 | 12 | 23 |
| Felix Jorge | 2014-2019 | 8 | 8 | .500 | 4.82 | 27 | 22 | 0 | 0 | 2 | 125.0 | 130 | 67 | 19 | 52 | 100 |
| Ariel Jurado | 2020-2020 | 1 | 0 | 1.000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 |
| Salvador Justo | 2019-2019 | 0 | 1 | .000 | 3.86 | 4 | 0 | 0 | 0 | 2 | 4.2 | 4 | 2 | 1 | 0 | 4 |
