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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 |
|---|---|---|---|---|---|---|---|---|---|
| Alec Jackson | 2031-2031 | .000 | 0 | 0 | 6 | 2 | 1 | 3.10 | 80 |
| Ben Jackson | 2024-2027 | .000 | 0 | 0 | 3 | 1 | 1 | 4.25 | 72 |
| Brad Jackson | 2029-2030 | .308 | 8 | 50 | 0 | 0 | 0 | 0.00 | 0 |
| John Jackson | 2023-2024 | .000 | 0 | 0 | 19 | 11 | 0 | 3.95 | 193 |
| John Jackson | 2019-2023 | .319 | 3 | 20 | 0 | 0 | 0 | 0.00 | 0 |
| Joseph Jackson | 2015-2015 | .250 | 3 | 36 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Jackson | 2018-2027 | .000 | 0 | 0 | 17 | 9 | 0 | 2.76 | 169 |
| Phil Jackson | 2029-2031 | .262 | 2 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Sonny Jackson | 2024-2030 | .250 | 0 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Steven Jackson | 2013-2013 | .310 | 2 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Woody Jacobs | 2018-2023 | .091 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Manuel Jaimes | 2024-2024 | .267 | 1 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Matthew James | 2029-2030 | .305 | 32 | 148 | 0 | 0 | 0 | 0.00 | 0 |
| Wayne James | 2022-2025 | .298 | 7 | 122 | 0 | 0 | 0 | 0.00 | 0 |
| William James | 2018-2022 | .350 | 0 | 4 | 0 | 0 | 0 | 0.00 | 0 |
| Ron Jamison | 2031-2031 | .000 | 0 | 0 | 1 | 0 | 0 | 4.81 | 14 |
| Jorge Jaquez | 2014-2014 | .287 | 14 | 71 | 0 | 0 | 0 | 0.00 | 0 |
| Jesús Jaramillo | 2029-2031 | .260 | 18 | 104 | 0 | 0 | 0 | 0.00 | 0 |
| Miguel Jaramillo | 2029-2030 | .000 | 0 | 0 | 2 | 4 | 0 | 9.07 | 38 |
| Hemmuc Jefar | 2018-2020 | .298 | 20 | 127 | 0 | 0 | 0 | 0.00 | 0 |
| Tim Jefferies | 2031-2031 | .000 | 0 | 0 | 2 | 1 | 2 | 3.16 | 42 |
| Bob Jefferson | 2025-2027 | .000 | 0 | 0 | 10 | 4 | 2 | 3.00 | 105 |
| Tim Jefferson | 2026-2031 | .000 | 0 | 0 | 17 | 22 | 1 | 4.88 | 275 |
| John Jellison | 2013-2015 | .253 | 10 | 93 | 0 | 0 | 0 | 0.00 | 0 |
| Greg Jenkins | 2022-2023 | .000 | 0 | 0 | 8 | 10 | 0 | 3.83 | 157 |
| Joe Jenkins | 2031-2031 | .143 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| John Jenkins | 2023-2025 | .261 | 9 | 71 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Jenkins | 2026-2028 | .000 | 0 | 0 | 10 | 12 | 53 | 4.39 | 52 |
| Ron Jenkins | 2022-2028 | .000 | 0 | 0 | 14 | 7 | 5 | 4.27 | 215 |
| Glenn Jensen | 2016-2017 | .333 | 1 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Ray Jensen | 2031-2031 | .202 | 0 | 4 | 0 | 0 | 0 | 0.00 | 0 |
| Francisco Jiménez | 2014-2017 | .223 | 1 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Jorge Jiménez | 2030-2031 | .192 | 1 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| Juan Jiménez | 2031-2031 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Vicente Jiménez | 2027-2027 | .199 | 6 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Kei-thing Jiu | 2020-2020 | .000 | 0 | 0 | 1 | 1 | 1 | 5.97 | 21 |
| Tommy Johns | 2021-2021 | .382 | 0 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Dave Johnson | 2029-2030 | .309 | 11 | 85 | 0 | 0 | 0 | 0.00 | 0 |
| Frank Johnson | 2015-2025 | .271 | 7 | 137 | 0 | 0 | 0 | 0.00 | 0 |
| Henry Johnson | 2015-2017 | .174 | 22 | 73 | 0 | 0 | 0 | 0.00 | 0 |
| Justin Johnson | 2020-2020 | .304 | 10 | 69 | 0 | 0 | 0 | 0.00 | 0 |
| Nicholas Johnson | 2014-2015 | .177 | 3 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Preston Johnson | 2022-2023 | .200 | 0 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Stan Johnson | 2030-2031 | .214 | 8 | 60 | 0 | 0 | 0 | 0.00 | 0 |
| Arthur Johnston | 2030-2031 | .212 | 1 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Dave Johnston | 2017-2022 | .323 | 3 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| James Johnstone | 2013-2013 | .275 | 3 | 40 | 0 | 0 | 0 | 0.00 | 0 |
| Stephen Johson | 2013-2014 | .240 | 3 | 59 | 0 | 0 | 0 | 0.00 | 0 |
| Alexander Jones | 2023-2030 | .288 | 13 | 214 | 0 | 0 | 0 | 0.00 | 0 |
| Cullen Jones | 2022-2022 | .000 | 0 | 0 | 3 | 3 | 0 | 2.83 | 46 |
| Don Jones | 2031-2031 | .000 | 0 | 0 | 0 | 0 | 0 | 13.50 | 1 |
| Don Jones | 2026-2027 | .278 | 11 | 79 | 0 | 0 | 0 | 0.00 | 0 |
| Ed Jones | 2022-2030 | .194 | 4 | 20 | 0 | 0 | 0 | 0.00 | 0 |
| Fred Jones | 2013-2013 | .000 | 0 | 0 | 1 | 2 | 2 | 3.25 | 24 |
| Glenn Jones | 2030-2031 | .243 | 1 | 35 | 0 | 0 | 0 | 0.00 | 0 |
| Glenn Jones | 2023-2029 | .000 | 0 | 0 | 7 | 7 | 50 | 3.79 | 42 |
| Jason Jones | 2028-2031 | .000 | 0 | 0 | 29 | 27 | 1 | 3.95 | 415 |
| Jeff Jones | 2021-2022 | .291 | 7 | 125 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Jones | 2022-2022 | .266 | 6 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Jones | 2026-2031 | .000 | 0 | 0 | 1 | 2 | 0 | 5.20 | 25 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Steve Jones | 2018-2018 | .320 | 6 | 66 | 0 | 0 | 0 | 0.00 | 0 |
| Victor Jones | 2031-2031 | .000 | 0 | 0 | 3 | 3 | 3 | 3.71 | 54 |
| Von Jones | 2027-2030 | .305 | 4 | 67 | 0 | 0 | 0 | 0.00 | 0 |
| Walt Jones | 2029-2031 | .302 | 7 | 69 | 0 | 0 | 0 | 0.00 | 0 |
| Collin Jordan | 2027-2031 | .000 | 0 | 0 | 8 | 6 | 4 | 5.40 | 57 |
| Salvador Jordan | 2020-2023 | .000 | 0 | 0 | 4 | 6 | 0 | 2.71 | 51 |
| Dale Joseph | 2025-2029 | .286 | 23 | 138 | 0 | 0 | 0 | 0.00 | 0 |
| John Joseph | 2028-2029 | .000 | 0 | 0 | 5 | 11 | 0 | 7.71 | 65 |
| Kevin Joseph | 2021-2023 | .000 | 0 | 0 | 16 | 10 | 3 | 3.54 | 149 |
| Melvin Joseph | 2030-2031 | .242 | 8 | 69 | 0 | 0 | 0 | 0.00 | 0 |
| Eisuke Jouda | 2018-2023 | .236 | 37 | 172 | 0 | 0 | 0 | 0.00 | 0 |
| Dennis Joyce | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 2 |
| Travis Joyce | 2031-2031 | .218 | 1 | 11 | 0 | 0 | 0 | 0.00 | 0 |
| Lorenzo Juhasz | 2013-2013 | .091 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Armando Júlio | 2024-2025 | .291 | 2 | 47 | 0 | 0 | 0 | 0.00 | 0 |
| Rick Juneau | 2021-2021 | .271 | 1 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Razan Juro | 2018-2018 | .222 | 2 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Basil Justiz | 2013-2019 | .261 | 40 | 192 | 0 | 0 | 0 | 0.00 | 0 |
