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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hikaru Yamaguchi | 2032-2042 | 15 | 9 | .625 | 3.55 | 74 | 39 | 0 | 0 | 6 | 274.0 | 258 | 108 | 19 | 89 | 225 |
| Shiki Yamamoto | 2039-2040 | 1 | 4 | .200 | 5.20 | 6 | 6 | 0 | 0 | 0 | 36.1 | 39 | 21 | 6 | 8 | 17 |
| Akinori Yamauchi | 2038-2038 | 2 | 2 | .500 | 3.05 | 21 | 4 | 0 | 0 | 0 | 56.0 | 61 | 19 | 3 | 10 | 21 |
| Laurel Yanny | 2037-2037 | 2 | 1 | .667 | 4.32 | 16 | 0 | 0 | 0 | 2 | 33.1 | 30 | 16 | 3 | 21 | 24 |
| Mapuana Yara | 2033-2037 | 8 | 5 | .615 | 4.54 | 62 | 12 | 0 | 0 | 2 | 176.1 | 146 | 89 | 16 | 113 | 208 |
| Henry Yates | 2024-2024 | 6 | 3 | .667 | 2.30 | 10 | 10 | 0 | 0 | 0 | 58.2 | 46 | 15 | 1 | 30 | 63 |
| António Ybarra | 2015-2015 | 2 | 3 | .400 | 3.90 | 12 | 7 | 0 | 0 | 1 | 55.1 | 55 | 24 | 6 | 14 | 40 |
| José Ybarra | 2021-2025 | 5 | 6 | .455 | 5.92 | 139 | 1 | 0 | 0 | 8 | 285.2 | 309 | 188 | 24 | 237 | 193 |
| Roberto Ybarra | 2016-2016 | 3 | 4 | .429 | 2.15 | 38 | 0 | 0 | 0 | 15 | 46.0 | 24 | 11 | 4 | 16 | 52 |
| Stanley Yelnats | 2028-2041 | 5 | 5 | .500 | 5.00 | 18 | 15 | 0 | 0 | 0 | 84.2 | 86 | 47 | 6 | 32 | 48 |
| Hwa-pyung Yi | 2039-2042 | 6 | 4 | .600 | 3.84 | 52 | 0 | 0 | 0 | 10 | 65.2 | 55 | 28 | 9 | 36 | 75 |
| Kyung-un Yi | 2027-2028 | 3 | 4 | .429 | 1.62 | 54 | 0 | 0 | 0 | 3 | 61.0 | 46 | 11 | 5 | 19 | 46 |
| Seung-soo Yi | 2035-2040 | 3 | 3 | .500 | 3.30 | 32 | 2 | 1 | 0 | 2 | 60.0 | 47 | 22 | 10 | 18 | 34 |
| Won-min Yi | 2037-2037 | 0 | 0 | .000 | 8.68 | 10 | 0 | 0 | 0 | 0 | 18.2 | 25 | 18 | 7 | 9 | 17 |
| Won-u Yi | 2037-2040 | 6 | 5 | .545 | 3.96 | 37 | 14 | 1 | 0 | 4 | 109.0 | 107 | 48 | 7 | 42 | 77 |
| Hakan Yilmanz | 2035-2035 | 0 | 1 | .000 | 18.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 3 | 2 | 1 | 0 | 1 |
| Narihira Yokota | 2042-2042 | 1 | 1 | .500 | 6.33 | 21 | 0 | 0 | 0 | 0 | 42.2 | 55 | 30 | 8 | 29 | 39 |
| Sukejuro Yokoyama | 2029-2029 | 5 | 3 | .625 | 5.12 | 17 | 9 | 0 | 0 | 3 | 65.0 | 75 | 37 | 11 | 19 | 50 |
| Toshiki Yokoyama | 2029-2035 | 6 | 14 | .300 | 4.71 | 47 | 7 | 0 | 0 | 5 | 86.0 | 93 | 45 | 9 | 41 | 57 |
| Benny York | 2030-2030 | 0 | 0 | .000 | 1.46 | 6 | 0 | 0 | 0 | 0 | 12.1 | 9 | 2 | 0 | 4 | 8 |
| Yoriyoshi Yoshimura | 2032-2033 | 9 | 14 | .391 | 5.73 | 40 | 38 | 0 | 0 | 0 | 226.1 | 247 | 144 | 21 | 131 | 137 |
| Dexter Young | 2021-2021 | 0 | 0 | .000 | 6.23 | 10 | 0 | 0 | 0 | 0 | 8.2 | 9 | 6 | 3 | 9 | 5 |
| Hollis Young | 2016-2021 | 2 | 3 | .400 | 7.07 | 30 | 0 | 0 | 0 | 1 | 56.0 | 84 | 44 | 10 | 37 | 28 |
| Kyung-soo Yun | 2041-2042 | 5 | 6 | .455 | 6.19 | 33 | 17 | 0 | 0 | 3 | 88.2 | 100 | 61 | 15 | 28 | 68 |
