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| Name | Team | Age |
| Ryosei Yamazaki | Retired (2025, Age 37) | Died (2056, Age 68) |
| Drafted | Position | Bats/Throws |
| Round 1, Pick 6 (2013) |
RF | B/R |
| League | Option Years
|
Majors Service Time |
| Santo Rodriguez League | 0 | 9 years (35 games) |
| Total Rating
|
Arm | Range |
| Contact vs R | Contact vs L | Speed |
| Power vs R | Power vs L | Bunting |
| Endurance | Velocity | Control |
| Leadership
|
Mentor vs RHP
|
Mentor vs LHP
|
| Health
|
Injured Days
|
Birthday |
| 0 | 5/1/1988 | |
| WS Rings | WS Appearances | LCS Appearances |
| 0 | 0 | 1 |
| Alt Pos (LF) | Alt Pos (CF) | Alt Pos (3B) |
| (95.7 %) | (54.1 %) | (5.6 %) |
Stats | Splits | Playoffs | Positions | Improvements | Past Skills | Awards | Fielding | Game Log
| Year | Vs | G | AB | H | 2B | 3B | HR | RBI | BB | SO | OPS | OBP | SLG | AVG |
| 2013 | AHP | 24 | 35 | 12 | 3 | 0 | 0 | 1 | 6 | 6 | .868 | .439 | .429 | .343 |
| 2013 | HHP | 25 | 40 | 7 | 2 | 0 | 1 | 4 | 4 | 5 | .550 | .250 | .300 | .175 |
| 2013 | LHP | 8 | 12 | 6 | 2 | 0 | 1 | 4 | 1 | 1 | 1.455 | .538 | .917 | .500 |
| 2013 | RHP | 46 | 63 | 13 | 3 | 0 | 0 | 1 | 9 | 10 | .560 | .306 | .254 | .206 |
| 2017 | AHP | 74 | 219 | 57 | 5 | 2 | 4 | 15 | 25 | 36 | .699 | .343 | .356 | .260 |
| 2017 | HHP | 71 | 189 | 53 | 14 | 1 | 7 | 32 | 34 | 29 | .870 | .394 | .476 | .280 |
| 2017 | LHP | 50 | 60 | 17 | 3 | 1 | 0 | 7 | 6 | 7 | .725 | .358 | .367 | .283 |
| 2017 | RHP | 138 | 348 | 93 | 16 | 2 | 11 | 40 | 53 | 58 | .788 | .369 | .420 | .267 |
| 2018 | AHP | 66 | 78 | 16 | 1 | 0 | 0 | 9 | 11 | 13 | .529 | .311 | .218 | .205 |
| 2018 | HHP | 59 | 70 | 25 | 4 | 1 | 4 | 16 | 9 | 8 | 1.039 | .425 | .614 | .357 |
| 2018 | LHP | 37 | 54 | 14 | 1 | 0 | 2 | 8 | 8 | 11 | .748 | .359 | .389 | .259 |
| 2018 | RHP | 95 | 94 | 27 | 4 | 1 | 2 | 17 | 12 | 10 | .783 | .368 | .415 | .287 |
| 2019 | AHP | 59 | 140 | 37 | 2 | 1 | 2 | 9 | 15 | 25 | .671 | .335 | .336 | .264 |
| 2019 | HHP | 55 | 156 | 42 | 8 | 0 | 3 | 22 | 18 | 23 | .719 | .341 | .378 | .269 |
| 2019 | LHP | 42 | 85 | 24 | 4 | 1 | 3 | 11 | 8 | 14 | .799 | .340 | .459 | .282 |
| 2019 | RHP | 101 | 211 | 55 | 6 | 0 | 2 | 20 | 25 | 34 | .655 | .338 | .318 | .261 |
| 2020 | AHP | 56 | 66 | 14 | 3 | 0 | 3 | 8 | 10 | 8 | .710 | .316 | .394 | .212 |
| 2020 | HHP | 57 | 63 | 16 | 3 | 1 | 1 | 5 | 3 | 14 | .669 | .288 | .381 | .254 |
| 2020 | LHP | 15 | 22 | 4 | 1 | 0 | 0 | 0 | 3 | 2 | .507 | .280 | .227 | .182 |
| 2020 | RHP | 104 | 107 | 26 | 5 | 1 | 4 | 13 | 10 | 20 | .728 | .308 | .421 | .243 |
| 2021 | AHP | 38 | 35 | 9 | 2 | 0 | 0 | 4 | 7 | 2 | .695 | .381 | .314 | .257 |
| 2021 | HHP | 26 | 30 | 10 | 2 | 0 | 2 | 8 | 10 | 3 | 1.112 | .512 | .600 | .333 |
| 2021 | LHP | 13 | 11 | 1 | 0 | 0 | 0 | 1 | 2 | 0 | .322 | .231 | .091 | .091 |
| 2021 | RHP | 52 | 54 | 18 | 4 | 0 | 2 | 11 | 15 | 5 | 1.004 | .486 | .519 | .333 |
| 2022 | AHP | 33 | 32 | 11 | 3 | 0 | 1 | 5 | 2 | 3 | .914 | .382 | .531 | .344 |
| 2022 | HHP | 26 | 30 | 6 | 2 | 0 | 0 | 1 | 3 | 5 | .539 | .273 | .267 | .200 |
| 2022 | LHP | 13 | 18 | 6 | 2 | 0 | 1 | 4 | 0 | 5 | .944 | .333 | .611 | .333 |
| 2022 | RHP | 49 | 44 | 11 | 3 | 0 | 0 | 2 | 5 | 3 | .645 | .327 | .318 | .250 |
| 2023 | AHP | 50 | 111 | 26 | 4 | 1 | 3 | 14 | 11 | 22 | .673 | .303 | .369 | .234 |
| 2023 | HHP | 42 | 37 | 9 | 1 | 1 | 1 | 6 | 7 | 4 | .769 | .364 | .405 | .243 |
| 2023 | LHP | 18 | 33 | 4 | 1 | 0 | 0 | 1 | 3 | 6 | .346 | .194 | .152 | .121 |
| 2023 | RHP | 77 | 115 | 31 | 4 | 2 | 4 | 19 | 15 | 20 | .797 | .354 | .443 | .270 |
| 2024 | AHP | 32 | 62 | 14 | 1 | 0 | 0 | 4 | 5 | 10 | .526 | .284 | .242 | .226 |
| 2024 | HHP | 40 | 72 | 25 | 3 | 2 | 1 | 16 | 6 | 10 | .879 | .392 | .486 | .347 |
| 2024 | LHP | 25 | 56 | 16 | 1 | 2 | 0 | 9 | 3 | 10 | .692 | .317 | .375 | .286 |
| 2024 | RHP | 60 | 78 | 23 | 3 | 0 | 1 | 11 | 8 | 10 | .732 | .360 | .372 | .295 |
| 2025 | AHP | 20 | 57 | 10 | 0 | 1 | 1 | 4 | 5 | 11 | .505 | .242 | .263 | .175 |
| 2025 | HHP | 22 | 73 | 18 | 2 | 1 | 1 | 7 | 10 | 10 | .684 | .341 | .342 | .247 |
| 2025 | LHP | 19 | 20 | 6 | 1 | 0 | 0 | 1 | 3 | 3 | .741 | .391 | .350 | .300 |
| 2025 | RHP | 38 | 110 | 22 | 1 | 2 | 2 | 10 | 12 | 18 | .582 | .282 | .300 | .200 |
| Total | AHP | 452 | 835 | 206 | 24 | 5 | 14 | 73 | 97 | 136 | .665 | .328 | .338 | .247 |
| Total | HHP | 423 | 760 | 211 | 41 | 7 | 21 | 117 | 104 | 111 | .798 | .365 | .433 | .278 |
| Total | LHP | 240 | 371 | 98 | 16 | 4 | 7 | 46 | 37 | 59 | .717 | .332 | .385 | .264 |
| Total | RHP | 760 | 1224 | 319 | 49 | 8 | 28 | 144 | 164 | 188 | .732 | .350 | .382 | .261 |
| Total | 875 | 1595 | 417 | 65 | 12 | 35 | 190 | 201 | 247 | .729 | .346 | .383 | .261 |
| Date | Transaction |
| 2025-11-01 | Ryosei Yamazaki has retired from the Seattle Pilots |
| 2025-04-18 | The Seattle Pilots have acquired Ryosei Yamazaki from the waiver wire. |
| 2025-03-25 | The Chicago Koalas have promoted Ken Kelleher to the major league team. The Chicago Koalas have designated Ryosei Yamazaki for assignment. |
| 2023-05-10 | The Chicago Koalas have promoted Ryosei Yamazaki to the major league team. The Chicago Koalas have designated Matt Risberg for assignment. |
| 2023-05-05 | The Chicago Koalas have acquired Ryosei Yamazaki from the waiver wire. |
| 2023-04-18 | The San Francisco Seals have waived Ryosei Yamazaki. |
| 2023-03-25 | The San Francisco Seals have designated Ryosei Yamazaki for assignment. |
| 2017-04-01 | The San Francisco Seals have promoted Ryosei Yamazaki to the major league team. The San Francisco Seals have designated Tomoki Nitta for assignment. |
| 2014-03-25 | The San Francisco Seals have sent Ryosei Yamazaki to the minors. |
| 2013-08-11 | The San Francisco Seals have promoted Ryosei Yamazaki to the major league team. The San Francisco Seals have promoted Doug McGowan to the major league team. |
| 2013-06-27 | The San Francisco Seals have sent Ryosei Yamazaki to the minors. |
| 2013-05-15 | The San Francisco Seals have promoted Ryosei Yamazaki to the major league team. |