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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 |
|---|---|---|---|---|---|---|---|---|---|
| Bill Jackson | 2023-2026 | .320 | 14 | 61 | 0 | 0 | 0 | 0.00 | 0 |
| Ernest Jackson | 2031-2042 | .264 | 85 | 288 | 0 | 0 | 0 | 0.00 | 0 |
| Frank Jackson | 2027-2032 | .000 | 0 | 0 | 25 | 34 | 1 | 6.00 | 425 |
| Johnny Jackson | 2030-2030 | .000 | 0 | 0 | 0 | 1 | 0 | 3.86 | 2 |
| Lindsay Jackson | 2041-2041 | .216 | 0 | 3 | 0 | 0 | 0 | 0.00 | 0 |
| Steve Jackson | 2024-2028 | .000 | 0 | 0 | 19 | 26 | 2 | 6.03 | 377 |
| Will Jackson | 2024-2025 | .296 | 64 | 219 | 0 | 0 | 0 | 0.00 | 0 |
| Marcus Jacobs | 2027-2027 | .234 | 22 | 77 | 0 | 0 | 0 | 0.00 | 0 |
| Nari Jaconelli | 2029-2034 | .000 | 0 | 0 | 11 | 6 | 0 | 6.29 | 74 |
| Raphael Jacopino | 2040-2043 | .306 | 17 | 83 | 0 | 0 | 0 | 0.00 | 0 |
| Bruce James | 2022-2026 | .000 | 0 | 0 | 47 | 39 | 0 | 5.38 | 536 |
| Darren James | 2019-2019 | .000 | 0 | 0 | 0 | 1 | 0 | 10.24 | 5 |
| William James | 2016-2021 | .260 | 1 | 16 | 0 | 0 | 0 | 6.75 | 0 |
| Lance Janzen | 2033-2039 | .306 | 2 | 14 | 0 | 0 | 0 | 0.00 | 0 |
| José Jáquez | 2036-2040 | .000 | 0 | 0 | 21 | 41 | 2 | 6.03 | 439 |
| Jesús Jaramillo | 2016-2020 | .316 | 45 | 171 | 0 | 0 | 0 | 0.00 | 0 |
| John Jarville | 2040-2043 | .000 | 0 | 0 | 34 | 35 | 0 | 5.28 | 278 |
| Tom Jefferson | 2037-2039 | .296 | 14 | 91 | 0 | 0 | 0 | 0.00 | 0 |
| Ray Jeffery | 2034-2035 | .000 | 0 | 0 | 8 | 8 | 0 | 6.51 | 105 |
| Randy Jeffes | 2030-2030 | .000 | 0 | 0 | 9 | 10 | 0 | 5.19 | 106 |
| Ken Jenkins | 2027-2030 | .000 | 0 | 0 | 2 | 4 | 1 | 5.63 | 64 |
| Lorne Jenkins | 2040-2040 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Lyndon Jenkins | 2032-2032 | .500 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Xavier Jenkins | 2022-2024 | .278 | 26 | 103 | 0 | 0 | 0 | 0.00 | 0 |
| Kai-ge Jian | 2032-2032 | .000 | 0 | 0 | 0 | 0 | 2 | 0.00 | 1 |
| Octávio Jiménez | 2036-2038 | .326 | 8 | 66 | 0 | 0 | 0 | 0.00 | 0 |
| Pepe Jiménez | 2022-2022 | .224 | 1 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Salvador Jiménez | 2032-2034 | .272 | 9 | 60 | 0 | 0 | 0 | 0.00 | 0 |
| Sigfrid Joachimsthaler | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Maxim Jochems | 2035-2040 | .304 | 20 | 183 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Darrell Johnson | 2027-2028 | .268 | 19 | 65 | 0 | 0 | 0 | 0.00 | 0 |
| Derrick Johnson | 2014-2020 | .000 | 0 | 0 | 32 | 22 | 33 | 5.50 | 87 |
| Francis Johnson | 2027-2029 | .000 | 0 | 0 | 9 | 17 | 1 | 5.53 | 174 |
| Glenn Johnson | 2016-2020 | .214 | 22 | 120 | 0 | 0 | 0 | 64.80 | 0 |
| Randall Johnson | 2029-2035 | .261 | 12 | 106 | 0 | 0 | 0 | 0.00 | 0 |
| Tristan Johnson | 2019-2022 | .000 | 0 | 0 | 2 | 5 | 0 | 5.54 | 54 |
| Johnny Johnston | 2020-2020 | .000 | 0 | 0 | 0 | 2 | 0 | 5.73 | 29 |
| Mark Johnston | 2015-2015 | .333 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Brent Johnstone | 2029-2029 | .000 | 0 | 0 | 0 | 1 | 0 | 3.00 | 3 |
| Alistair Jones | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Billy Jones | 2034-2043 | .305 | 56 | 259 | 0 | 0 | 0 | 0.00 | 0 |
| Conrad Jones | 2028-2035 | .310 | 107 | 432 | 0 | 0 | 0 | 0.00 | 0 |
| Dane Jones | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Dave Jones | 2028-2028 | .259 | 1 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Fraser Jones | 2032-2034 | .290 | 18 | 79 | 0 | 0 | 0 | 0.00 | 0 |
| Glen Jones | 2035-2036 | .000 | 0 | 0 | 5 | 4 | 2 | 4.75 | 71 |
| Harvey Jones | 2022-2028 | .315 | 53 | 279 | 0 | 0 | 0 | 0.00 | 0 |
| Jeremy Jones | 2016-2019 | .000 | 0 | 0 | 27 | 23 | 0 | 5.25 | 247 |
| Jerry Jones | 2030-2036 | .285 | 9 | 39 | 0 | 0 | 0 | 0.00 | 0 |
| Jonathon Jones | 2016-2017 | .263 | 24 | 65 | 0 | 0 | 0 | 0.00 | 0 |
| Keith Jones | 2022-2025 | .326 | 20 | 115 | 0 | 0 | 0 | 0.00 | 0 |
| Kip Jones | 2035-2042 | .284 | 14 | 66 | 0 | 0 | 0 | 0.00 | 0 |
| Lloyd Jones | 2038-2040 | .185 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Michael Jones | 2014-2020 | .000 | 0 | 0 | 8 | 17 | 23 | 5.43 | 85 |
| Neil Jones | 2015-2016 | .000 | 0 | 0 | 2 | 11 | 2 | 8.01 | 77 |
| Paul Jones | 2026-2026 | .350 | 0 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| Ron Jones | 2019-2019 | .000 | 0 | 0 | 4 | 2 | 0 | 5.53 | 39 |
| Shawn Jones | 2037-2038 | .254 | 54 | 174 | 0 | 0 | 0 | 0.00 | 0 |
| William Jones | 2030-2038 | .000 | 0 | 0 | 24 | 14 | 4 | 5.03 | 278 |
| Petro Joosten | 2014-2017 | .321 | 16 | 247 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Mark Jordan | 2033-2037 | .255 | 3 | 12 | 0 | 0 | 0 | 0.00 | 0 |
| Patrick Jordan | 2029-2030 | .000 | 0 | 0 | 6 | 3 | 3 | 5.28 | 67 |
| Robert Jordan | 2018-2020 | .245 | 27 | 92 | 0 | 0 | 0 | 0.00 | 0 |
| Jeremy Joseph | 2020-2020 | .000 | 0 | 0 | 0 | 1 | 2 | 4.73 | 14 |
| Michael Joseph | 2015-2015 | .271 | 0 | 40 | 0 | 0 | 0 | 0.00 | 0 |
| Peter Joseph | 2031-2034 | .292 | 49 | 208 | 0 | 0 | 0 | 0.00 | 0 |
| Pio Josi | 2018-2035 | .284 | 24 | 130 | 0 | 0 | 0 | 0.00 | 0 |
| Kiminobu Jouda | 2026-2027 | .000 | 0 | 0 | 6 | 5 | 2 | 5.92 | 61 |
| Leon Journeycake | 2027-2028 | .273 | 18 | 59 | 0 | 0 | 0 | 0.00 | 0 |
| Danny Joy | 2026-2028 | .274 | 15 | 42 | 0 | 0 | 0 | 0.00 | 0 |
| Doug Joyce | 2037-2040 | .000 | 0 | 0 | 24 | 30 | 6 | 5.26 | 399 |
| Ángel Juárez | 2023-2025 | .294 | 11 | 42 | 0 | 0 | 0 | 0.00 | 0 |
| Vicente Juárez | 2018-2019 | .000 | 0 | 0 | 6 | 6 | 16 | 6.66 | 71 |
| Zak Justice | 2024-2026 | .228 | 1 | 10 | 0 | 0 | 0 | 0.00 | 0 |
