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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Reijiro Yamaguchi | 2014-2021 | 46 | 61 | .430 | 5.65 | 185 | 172 | 0 | 0 | 0 | 858.0 | 878 | 539 | 76 | 579 | 679 |
| Yoshiki Yamaguchi | 2026-2027 | 8 | 7 | .533 | 4.34 | 101 | 2 | 0 | 0 | 9 | 151.1 | 148 | 73 | 16 | 90 | 130 |
| Terumoto Yamamoto | 2022-2026 | 11 | 13 | .458 | 5.55 | 110 | 28 | 1 | 1 | 8 | 274.0 | 327 | 169 | 47 | 116 | 225 |
| Tsukasa Yamanoue | 2015-2019 | 36 | 29 | .554 | 4.43 | 91 | 90 | 1 | 0 | 0 | 530.2 | 539 | 261 | 66 | 257 | 414 |
| Coco Yamashita | 2019-2027 | 37 | 19 | .661 | 4.54 | 436 | 0 | 0 | 0 | 13 | 537.0 | 575 | 271 | 71 | 194 | 449 |
| Nobuhisa Yamashita | 2017-2027 | 54 | 82 | .397 | 4.11 | 732 | 17 | 1 | 0 | 320 | 845.0 | 879 | 386 | 62 | 463 | 806 |
| Apupa Yavar | 2024-2027 | 20 | 17 | .541 | 4.90 | 52 | 41 | 1 | 0 | 1 | 284.2 | 300 | 155 | 35 | 105 | 186 |
| Chong-su Yi | 2025-2027 | 10 | 5 | .667 | 4.01 | 99 | 0 | 0 | 0 | 12 | 179.1 | 183 | 80 | 20 | 75 | 156 |
| Hiroya Yoshida | 2021-2024 | 19 | 24 | .442 | 5.36 | 82 | 55 | 2 | 0 | 1 | 406.0 | 467 | 242 | 77 | 94 | 282 |
| Haruki Yoshino | 2026-2026 | 1 | 0 | 1.000 | 4.15 | 13 | 0 | 0 | 0 | 1 | 26.0 | 27 | 12 | 3 | 7 | 16 |
| Rob Young | 2018-2027 | 97 | 97 | .500 | 4.87 | 305 | 305 | 23 | 3 | 0 | 1730.1 | 2035 | 936 | 226 | 447 | 1281 |
| Ju-wei Yuan | 2018-2024 | 2 | 2 | .500 | 8.71 | 41 | 0 | 0 | 0 | 1 | 41.1 | 60 | 40 | 9 | 31 | 50 |
| Ed Yuke | 2021-2023 | 24 | 28 | .462 | 5.16 | 76 | 68 | 1 | 0 | 1 | 396.0 | 388 | 227 | 21 | 272 | 262 |
