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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 | 9-0 | 46 | 61 | .430 | 5.65 | 185 | 172 | 0 | 0 | 0 | 858.0 | 878 | 539 | 76 | 579 | 679 |
| Yoshiki Yamaguchi | 1-1 | 9 | 8 | .529 | 4.47 | 109 | 2 | 0 | 0 | 9 | 163.0 | 166 | 81 | 17 | 102 | 138 |
| Terumoto Yamamoto | 1-2 | 11 | 13 | .458 | 5.55 | 110 | 28 | 1 | 1 | 8 | 274.0 | 327 | 169 | 47 | 116 | 225 |
| Tsukasa Yamanoue | 4-0 | 36 | 29 | .554 | 4.43 | 91 | 90 | 1 | 0 | 0 | 530.2 | 539 | 261 | 66 | 257 | 414 |
| Coco Yamashita | 3-1 | 39 | 23 | .629 | 4.57 | 473 | 0 | 0 | 0 | 21 | 577.1 | 616 | 293 | 76 | 211 | 482 |
| Nobuhisa Yamashita | 10-1 | 54 | 84 | .391 | 4.20 | 750 | 18 | 1 | 0 | 320 | 856.1 | 899 | 400 | 65 | 471 | 812 |
| Xiong Yang | 0-1 | 2 | 0 | 1.000 | 4.43 | 10 | 0 | 0 | 0 | 0 | 20.1 | 15 | 10 | 2 | 16 | 9 |
| Apupa Yavar | 3-1 | 33 | 32 | .508 | 4.89 | 84 | 73 | 4 | 1 | 1 | 497.0 | 517 | 270 | 58 | 188 | 330 |
| Chong-su Yi | 1-1 | 11 | 5 | .688 | 4.08 | 120 | 0 | 0 | 0 | 15 | 220.1 | 226 | 100 | 24 | 88 | 197 |
| Hiroya Yoshida | 3-0 | 19 | 24 | .442 | 5.36 | 82 | 55 | 2 | 0 | 1 | 406.0 | 467 | 242 | 77 | 94 | 282 |
| Haruki Yoshino | 3-1 | 1 | 0 | 1.000 | 4.15 | 13 | 0 | 0 | 0 | 1 | 26.0 | 27 | 12 | 3 | 7 | 16 |
| Rob Young | 29-1 | 101 | 101 | .500 | 4.84 | 317 | 317 | 24 | 4 | 0 | 1815.1 | 2124 | 976 | 231 | 474 | 1332 |
| Ju-wei Yuan | 0-2024 | 2 | 2 | .500 | 8.71 | 41 | 0 | 0 | 0 | 1 | 41.1 | 60 | 40 | 9 | 31 | 50 |
| Ed Yuke | 4-0 | 24 | 28 | .462 | 5.16 | 76 | 68 | 1 | 0 | 1 | 396.0 | 388 | 227 | 21 | 272 | 262 |
