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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 |
|---|---|---|---|---|---|---|---|---|---|
| Colm Jackman | 2026-2027 | .224 | 2 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Allan Jackson | 2017-2017 | .236 | 5 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Barrett Jackson | 2025-2028 | .000 | 0 | 0 | 5 | 2 | 2 | 3.76 | 76 |
| Brit Jackson | 2020-2020 | .000 | 0 | 0 | 11 | 1 | 2 | 3.64 | 78 |
| Bryan Jackson | 2015-2016 | .000 | 0 | 0 | 9 | 13 | 0 | 4.01 | 180 |
| Carlton Jackson | 2028-2031 | .290 | 35 | 164 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Jackson | 2029-2030 | .000 | 0 | 0 | 8 | 6 | 0 | 3.80 | 178 |
| Kevin Jackson | 2017-2023 | .000 | 0 | 0 | 8 | 7 | 2 | 4.84 | 118 |
| Mike Jackson | 2012-2021 | .000 | 0 | 0 | 21 | 17 | 5 | 4.39 | 366 |
| Pat Jackson | 2027-2027 | .000 | 0 | 0 | 4 | 6 | 0 | 5.90 | 57 |
| Stephen Jackson | 2017-2018 | .338 | 6 | 11 | 0 | 0 | 0 | 0.00 | 0 |
| Coy Jacobs | 2022-2027 | .267 | 48 | 133 | 0 | 0 | 0 | 0.00 | 0 |
| John Jacobs | 2018-2019 | .000 | 0 | 0 | 5 | 6 | 24 | 4.33 | 60 |
| Johnny Jacobs | 2018-2025 | .000 | 0 | 0 | 19 | 8 | 34 | 4.67 | 169 |
| Todd Jacobs | 2023-2023 | .305 | 14 | 54 | 0 | 0 | 0 | 0.00 | 0 |
| Eddy Jacobse | 2022-2023 | .280 | 5 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| David Jacobson | 2026-2029 | .254 | 19 | 168 | 0 | 0 | 0 | 0.00 | 0 |
| Nathan Jacobson | 2028-2030 | .206 | 24 | 77 | 0 | 0 | 0 | 0.00 | 0 |
| Nick Jacobson | 2016-2017 | .263 | 37 | 173 | 0 | 0 | 0 | 0.00 | 0 |
| Stéphane Jacquemin | 2029-2029 | .371 | 4 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Younis Jahangiri | 2024-2028 | .000 | 0 | 0 | 1 | 1 | 2 | 3.29 | 30 |
| Mike Jahn | 2020-2027 | .276 | 38 | 230 | 0 | 0 | 0 | 0.00 | 0 |
| Kasilingam Jaisimha | 2031-2032 | .243 | 5 | 30 | 0 | 0 | 0 | 0.00 | 0 |
| Jeffery James | 2016-2017 | .000 | 0 | 0 | 10 | 7 | 18 | 2.72 | 213 |
| Jerry James | 2020-2024 | .000 | 0 | 0 | 7 | 9 | 14 | 5.48 | 183 |
| Jim James | 2029-2029 | .200 | 2 | 14 | 0 | 0 | 0 | 0.00 | 0 |
| Steve James | 2018-2020 | .217 | 8 | 25 | 0 | 0 | 0 | 0.00 | 0 |
| Joey Jameson | 2031-2032 | .166 | 12 | 30 | 0 | 0 | 0 | 0.00 | 0 |
| Johannes Jancke | 2026-2027 | .256 | 5 | 17 | 0 | 0 | 0 | 0.00 | 0 |
| Freek Janszen | 2026-2028 | .000 | 0 | 0 | 14 | 5 | 27 | 3.50 | 193 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Claudio Jaramillo | 2016-2016 | .196 | 1 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Joaquín Jaramillo | 2021-2024 | .249 | 26 | 149 | 0 | 0 | 0 | 0.00 | 0 |
| José Jaramillo | 2014-2015 | .258 | 26 | 116 | 0 | 0 | 0 | 0.00 | 0 |
| Juan Jaramillo | 2025-2025 | .378 | 4 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| Bhavsar Jayasurya | 2024-2028 | .268 | 43 | 166 | 0 | 0 | 0 | 0.00 | 0 |
| Frank Jayne | 2021-2021 | .000 | 0 | 0 | 0 | 0 | 0 | 67.50 | 0 |
| Jeremy Jefferson | 2032-2032 | .000 | 0 | 0 | 2 | 0 | 0 | 8.10 | 17 |
| Ray Jefferson | 2019-2023 | .000 | 0 | 0 | 31 | 39 | 1 | 5.94 | 531 |
| Larry Jeffries | 2030-2032 | .267 | 30 | 118 | 0 | 0 | 0 | 0.00 | 0 |
| Geoffrey Jellineck | 2018-2025 | .298 | 66 | 237 | 0 | 0 | 0 | 0.00 | 0 |
| Ai-de Jen | 2023-2024 | .000 | 0 | 0 | 5 | 2 | 3 | 5.18 | 80 |
| Martin Jenkins | 2018-2021 | .290 | 13 | 98 | 0 | 0 | 0 | 0.00 | 0 |
| Michael Jenkins | 2028-2029 | .261 | 49 | 182 | 0 | 0 | 0 | 0.00 | 0 |
| Patrick Jenkins | 2013-2021 | .000 | 0 | 0 | 13 | 10 | 16 | 3.58 | 264 |
| Ryan Jenkins | 2018-2028 | .000 | 0 | 0 | 16 | 7 | 1 | 3.66 | 178 |
| Howard Jennings | 2032-2032 | .275 | 6 | 40 | 0 | 0 | 0 | 0.00 | 0 |
| Paolo Jens | 2030-2032 | .000 | 0 | 0 | 23 | 17 | 6 | 4.88 | 340 |
| Lou Jensen | 2017-2017 | .262 | 10 | 38 | 0 | 0 | 0 | 0.00 | 0 |
| Ron Jeremy | 2026-2026 | .233 | 1 | 4 | 0 | 0 | 0 | 0.00 | 0 |
| Tom Jerome | 2019-2023 | .000 | 0 | 0 | 18 | 17 | 5 | 5.08 | 233 |
| Randall Jervis | 2031-2031 | 1.000 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Matthew Jesty | 2029-2029 | .208 | 0 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Vic Jevons | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Aaron Jewell | 2016-2020 | .000 | 0 | 0 | 1 | 3 | 2 | 6.08 | 131 |
| Lawrence Jewers | 2018-2019 | .283 | 33 | 169 | 0 | 0 | 0 | 0.00 | 0 |
| Pang Ji | 2029-2031 | .000 | 0 | 0 | 4 | 5 | 1 | 5.43 | 61 |
| Ah-cy Jian | 2030-2031 | .000 | 0 | 0 | 2 | 4 | 2 | 2.91 | 45 |
| Xue-liang Jianbua | 2026-2026 | .000 | 0 | 0 | 0 | 2 | 0 | 22.24 | 10 |
| Kai-ge Jiao | 2028-2028 | .000 | 0 | 0 | 3 | 4 | 0 | 6.95 | 51 |
| Su-wu Jiao | 2028-2031 | .258 | 10 | 48 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Carlos Jiménez | 2030-2032 | .290 | 17 | 136 | 0 | 0 | 0 | 0.00 | 0 |
| Gilberto Jiménez | 2020-2022 | .269 | 16 | 76 | 0 | 0 | 0 | 0.00 | 0 |
| Iván Jiménez | 2028-2032 | .211 | 3 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Jorge Jiménez | 2019-2027 | .254 | 11 | 108 | 0 | 0 | 0 | 0.00 | 0 |
| José Jiménez | 2025-2027 | .282 | 3 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| José Jiménez | 2028-2031 | .224 | 5 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Júlio Jiménez | 2032-2032 | .289 | 2 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Paco Jiménez | 2024-2032 | .285 | 35 | 101 | 0 | 0 | 0 | 0.00 | 0 |
| Rafael Jiménez | 2026-2029 | .000 | 0 | 0 | 4 | 1 | 1 | 3.68 | 148 |
| Ramón Jiménez | 2017-2020 | .000 | 0 | 0 | 13 | 8 | 4 | 4.58 | 200 |
| Kun Jing | 2029-2029 | .000 | 0 | 0 | 1 | 3 | 0 | 6.91 | 28 |
| Enreecko Jocson | 2029-2031 | .230 | 25 | 93 | 0 | 0 | 0 | 0.00 | 0 |
| Hai-dong Joe | 2017-2027 | .262 | 25 | 148 | 0 | 0 | 0 | 0.00 | 0 |
| Sun Joe | 2022-2022 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Billy Joel | 2028-2029 | .290 | 8 | 43 | 0 | 0 | 0 | 0.00 | 0 |
| Kennan Johannson | 2020-2020 | .000 | 0 | 0 | 1 | 6 | 14 | 4.34 | 29 |
| Allahbukhsh Johiya | 2021-2021 | .194 | 2 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Fakhruddin Johiya | 2020-2020 | .000 | 0 | 0 | 7 | 6 | 0 | 5.71 | 90 |
| Cutter John | 2013-2016 | .000 | 0 | 0 | 23 | 7 | 5 | 3.78 | 186 |
| Andrew Johnson | 2027-2028 | .000 | 0 | 0 | 4 | 10 | 0 | 4.55 | 111 |
| Chris Johnson | 2025-2025 | .000 | 0 | 0 | 7 | 4 | 1 | 2.63 | 126 |
| Jared Johnson | 2018-2018 | .295 | 15 | 52 | 0 | 0 | 0 | 0.00 | 0 |
| Jim Johnson | 2032-2032 | .208 | 6 | 26 | 0 | 0 | 0 | 0.00 | 0 |
| Ken Johnson | 2032-2032 | .220 | 1 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Nick Johnson | 2012-2014 | .215 | 26 | 134 | 0 | 0 | 0 | 0.00 | 0 |
| Patrick Johnson | 2024-2028 | .000 | 0 | 0 | 5 | 4 | 0 | 4.11 | 79 |
| Ron Johnson | 2022-2025 | .291 | 2 | 15 | 0 | 0 | 0 | 0.00 | 0 |
| Ronnie Johnson | 2019-2020 | .220 | 11 | 40 | 0 | 0 | 0 | 0.00 | 0 |
| Ryan Johnson | 2018-2019 | .293 | 21 | 134 | 0 | 0 | 0 | 0.00 | 0 |
| Tanner Johnson | 2024-2024 | .000 | 0 | 0 | 0 | 1 | 0 | 1.04 | 11 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Todd Johnson | 2020-2026 | .000 | 0 | 0 | 8 | 5 | 8 | 4.45 | 205 |
| Walter Johnson | 2029-2029 | .278 | 0 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Bob Johnston | 2026-2027 | .000 | 0 | 0 | 6 | 14 | 0 | 5.19 | 131 |
| Brett Johnston | 2031-2031 | .000 | 0 | 0 | 6 | 7 | 0 | 9.14 | 45 |
| Clancy Johnston | 2027-2027 | .238 | 3 | 28 | 0 | 0 | 0 | 0.00 | 0 |
| Jason Johnston | 2013-2019 | .000 | 0 | 0 | 23 | 18 | 86 | 3.41 | 301 |
| Joshua Johnston | 2018-2022 | .266 | 1 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| Mitch Johnston | 2019-2021 | .000 | 0 | 0 | 3 | 9 | 0 | 9.15 | 62 |
| Paul Johnston | 2025-2026 | .000 | 0 | 0 | 18 | 12 | 0 | 3.89 | 210 |
| Paul Johnston | 2014-2014 | .000 | 0 | 0 | 3 | 4 | 0 | 4.27 | 55 |
| Roy Johnston | 2030-2030 | .265 | 7 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| Steve Johnston | 2017-2021 | .269 | 23 | 103 | 0 | 0 | 0 | 0.00 | 0 |
| Steve Johnston | 2013-2016 | .000 | 0 | 0 | 33 | 54 | 0 | 5.08 | 649 |
| Tom Johnston | 2016-2023 | .250 | 30 | 156 | 0 | 0 | 0 | 0.00 | 0 |
| Wes Johnston | 2015-2017 | .000 | 0 | 0 | 9 | 5 | 14 | 5.00 | 113 |
| Jordan Johnstone | 2014-2021 | .000 | 0 | 0 | 8 | 4 | 0 | 3.44 | 141 |
| Nathan Johnstone | 2030-2030 | .000 | 0 | 0 | 4 | 5 | 1 | 8.10 | 92 |
| Kai Jolliffe | 2025-2032 | .243 | 11 | 94 | 0 | 0 | 0 | 0.00 | 0 |
| Al Jones | 2020-2022 | .000 | 0 | 0 | 5 | 3 | 2 | 5.53 | 137 |
| Byron Jones | 2021-2024 | .000 | 0 | 0 | 17 | 27 | 0 | 5.26 | 359 |
| Cody Jones | 2029-2029 | .195 | 4 | 43 | 0 | 0 | 0 | 0.00 | 0 |
| Harvey Jones | 2018-2020 | .000 | 0 | 0 | 15 | 6 | 2 | 3.51 | 217 |
| John Jones | 2031-2032 | .231 | 3 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| John Jones | 2014-2014 | .245 | 6 | 69 | 0 | 0 | 0 | 0.00 | 0 |
| John Jones | 2024-2026 | .000 | 0 | 0 | 5 | 3 | 0 | 3.94 | 36 |
| Lee Jones | 2019-2021 | .256 | 5 | 84 | 0 | 0 | 0 | 0.00 | 0 |
| Leonard Jones | 2017-2021 | .000 | 0 | 0 | 27 | 30 | 10 | 4.67 | 366 |
| Mike Jones | 2018-2023 | .000 | 0 | 0 | 4 | 2 | 1 | 2.68 | 74 |
| Nathan Jones | 2015-2015 | .289 | 2 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Oscar Jones | 2020-2022 | .320 | 45 | 176 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Peter Jones | 2015-2023 | .245 | 25 | 119 | 0 | 0 | 0 | 0.00 | 0 |
| Ron Jones | 2020-2023 | .000 | 0 | 0 | 23 | 15 | 11 | 4.59 | 226 |
| Kuang-an Joo | 2022-2029 | .000 | 0 | 0 | 9 | 17 | 76 | 4.90 | 214 |
| Zhi-peng Joo | 2022-2023 | .282 | 12 | 73 | 0 | 0 | 0 | 0.00 | 0 |
| Roy Jordan | 2021-2021 | .250 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Chris Joseph | 2016-2018 | .263 | 40 | 129 | 0 | 0 | 0 | 0.00 | 0 |
| Nathaniel Joseph | 2029-2032 | .256 | 7 | 72 | 0 | 0 | 0 | 0.00 | 0 |
| Nicolas Joubert | 2030-2031 | .000 | 0 | 0 | 5 | 2 | 1 | 6.06 | 64 |
| Dimitri Jourdan | 2027-2032 | .000 | 0 | 0 | 23 | 12 | 3 | 4.60 | 275 |
| Bruce Joyner | 2015-2015 | .305 | 5 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| Earl Joyner | 2024-2026 | .267 | 1 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Wei-qiang Ju | 2029-2029 | .160 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Khai Juan | 2026-2027 | .000 | 0 | 0 | 0 | 1 | 0 | 9.86 | 12 |
| Qing-lai Juan | 2029-2032 | .000 | 0 | 0 | 15 | 14 | 0 | 4.88 | 211 |
| Xun Juan | 2024-2026 | .243 | 10 | 65 | 0 | 0 | 0 | 0.00 | 0 |
| Fernando Juárez | 2029-2031 | .260 | 16 | 89 | 0 | 0 | 0 | 0.00 | 0 |
| Tony Juarez | 2029-2029 | .000 | 0 | 0 | 0 | 0 | 0 | 18.26 | 4 |
| Ye-qing Jue | 2021-2026 | .000 | 0 | 0 | 17 | 11 | 6 | 5.21 | 317 |
| Brodie Juhl | 2029-2032 | .000 | 0 | 0 | 20 | 33 | 5 | 4.92 | 356 |
| Emir Jumah | 2021-2024 | .268 | 9 | 82 | 0 | 0 | 0 | 0.00 | 0 |
| Ling-lai Jung | 2024-2028 | .000 | 0 | 0 | 4 | 9 | 0 | 8.86 | 80 |
| Mason Jupe | 2020-2028 | .253 | 21 | 107 | 0 | 0 | 0 | 0.00 | 0 |
| Loeck Jurgens | 2021-2023 | .000 | 0 | 0 | 17 | 7 | 0 | 4.81 | 182 |
| Frank Justiniano | 2031-2031 | .000 | 0 | 0 | 4 | 3 | 0 | 4.58 | 73 |
