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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 | 2026-2028 | 9 | 8 | .529 | 4.47 | 109 | 2 | 0 | 0 | 9 | 163.0 | 166 | 81 | 17 | 102 | 138 |
| Monzaemon Yamamoto | 2032-2034 | 0 | 0 | .000 | 7.71 | 1 | 0 | 0 | 0 | 0 | 2.1 | 4 | 2 | 0 | 2 | 0 |
| Terumoto Yamamoto | 2022-2026 | 11 | 13 | .458 | 5.55 | 110 | 28 | 1 | 1 | 8 | 274.0 | 327 | 169 | 47 | 116 | 225 |
| Yoshida Yamamoto | 2034-2034 | 2 | 3 | .400 | 3.84 | 17 | 14 | 0 | 0 | 0 | 65.2 | 58 | 28 | 7 | 29 | 42 |
| Tsukasa Yamanoue | 2015-2019 | 36 | 29 | .554 | 4.43 | 91 | 90 | 1 | 0 | 0 | 530.2 | 539 | 261 | 66 | 257 | 414 |
| Motonobu Yamasaki | 2028-2034 | 0 | 0 | .000 | 2.70 | 1 | 0 | 0 | 0 | 0 | 3.1 | 3 | 1 | 1 | 2 | 4 |
| Coco Yamashita | 2019-2033 | 65 | 47 | .580 | 4.06 | 725 | 0 | 0 | 0 | 127 | 861.0 | 899 | 388 | 104 | 276 | 717 |
| Nobuhisa Yamashita | 2017-2028 | 54 | 84 | .391 | 4.20 | 750 | 18 | 1 | 0 | 320 | 856.1 | 899 | 400 | 65 | 471 | 812 |
| Manabu Yamauchi | 2031-2031 | 1 | 0 | 1.000 | 9.72 | 4 | 0 | 0 | 0 | 0 | 8.1 | 10 | 9 | 2 | 7 | 5 |
| Jian-guo Yang | 2032-2034 | 13 | 11 | .542 | 4.93 | 67 | 26 | 0 | 0 | 3 | 255.1 | 302 | 140 | 42 | 59 | 179 |
| Xiong Yang | 2028-2034 | 18 | 10 | .643 | 3.93 | 90 | 40 | 3 | 1 | 0 | 350.0 | 369 | 153 | 40 | 104 | 266 |
| Apupa Yavar | 2024-2030 | 39 | 41 | .487 | 4.73 | 129 | 93 | 5 | 1 | 1 | 688.1 | 716 | 362 | 83 | 267 | 432 |
| Ji-hwan Yea | 2034-2034 | 1 | 11 | .083 | 3.71 | 77 | 0 | 0 | 0 | 42 | 77.2 | 67 | 32 | 6 | 29 | 98 |
| Chong-su Yi | 2025-2034 | 32 | 22 | .593 | 3.71 | 334 | 12 | 0 | 0 | 38 | 569.1 | 563 | 235 | 58 | 222 | 491 |
| Sae-wan Yi | 2032-2033 | 4 | 3 | .571 | 5.80 | 30 | 1 | 0 | 0 | 1 | 76.0 | 70 | 49 | 16 | 27 | 72 |
| Norogumi Yokoyama | 2030-2034 | 24 | 21 | .533 | 4.54 | 95 | 66 | 1 | 0 | 1 | 432.0 | 405 | 218 | 68 | 144 | 426 |
| Hiroya Yoshida | 2021-2024 | 19 | 24 | .442 | 5.36 | 82 | 55 | 2 | 0 | 1 | 406.0 | 467 | 242 | 77 | 94 | 282 |
| Sawao Yoshimura | 2029-2034 | 6 | 5 | .545 | 4.93 | 116 | 0 | 0 | 0 | 1 | 140.2 | 153 | 77 | 21 | 57 | 119 |
| Haruki Yoshino | 2024-2034 | 1 | 0 | 1.000 | 4.15 | 13 | 0 | 0 | 0 | 1 | 26.0 | 27 | 12 | 3 | 7 | 16 |
| Rob Young | 2018-2029 | 114 | 106 | .518 | 4.75 | 358 | 334 | 26 | 5 | 4 | 1959.1 | 2260 | 1034 | 250 | 500 | 1425 |
| 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 |
