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Name Team Age
Koichi Yamanaka Retired (2025, Age 36) 63
Drafted Position Bats/Throws
Round 1, Pick 8
(2014)		 RF B/R
League Option Years   Majors Service Time
Harold Baines League 0 9 years (9 games)
Total Rating   Arm Range
B+ B  B-
Contact vs R Contact vs L Speed
B+ B+ B+
Power vs R Power vs L Bunting
B+ B+ D+
Endurance Velocity Control
B- F  D 
Leadership   Mentor vs RHP   Mentor vs LHP  
B- A+ A+
Health   Injured Days   Birthday
C- 0 7/10/1989
WS Rings WS Appearances LCS Appearances
3 3 4
Alt Pos (RF) Alt Pos (2B) Alt Pos (LF)
A+ (98.8 %) D+ (21.5 %) F  (2.3 %)

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
2017 AHP 47 199 50 12 1 6 20 18 45 .732 .320 .412 .251
2017 HHP 58 238 60 7 1 8 26 25 61 .714 .323 .391 .252
2017 LHP 49 121 24 4 0 4 9 9 29 .594 .263 .331 .198
2017 RHP 94 316 86 15 2 10 37 34 77 .771 .344 .427 .272
2018 AHP 66 278 72 14 1 8 32 27 49 .730 .327 .403 .259
2018 HHP 63 256 61 12 6 2 19 26 54 .661 .305 .355 .238
2018 LHP 54 142 36 7 3 4 17 14 29 .748 .318 .430 .254
2018 RHP 117 392 97 19 4 6 34 39 74 .678 .316 .362 .247
2019 AHP 69 293 65 15 4 6 20 36 58 .675 .313 .362 .222
2019 HHP 66 273 83 13 3 8 33 28 50 .833 .372 .462 .304
2019 LHP 60 140 36 6 1 6 15 13 27 .763 .320 .443 .257
2019 RHP 119 426 112 22 6 8 38 51 81 .747 .348 .399 .263
2020 AHP 70 292 65 8 2 6 29 31 55 .624 .298 .325 .223
2020 HHP 65 278 69 16 3 7 19 24 55 .713 .310 .403 .248
2020 LHP 46 113 21 3 1 2 10 9 17 .529 .246 .283 .186
2020 RHP 123 457 113 21 4 11 38 46 93 .701 .318 .383 .247
2021 AHP 73 293 71 9 1 8 24 34 59 .685 .323 .362 .242
2021 HHP 62 260 74 15 5 5 17 18 57 .769 .331 .438 .285
2021 LHP 49 135 38 6 2 4 14 12 31 .785 .340 .444 .281
2021 RHP 117 418 107 18 4 9 27 40 85 .705 .322 .383 .256
2022 AHP 66 255 68 13 1 10 39 31 54 .790 .347 .443 .267
2022 HHP 69 269 74 9 5 12 53 24 40 .810 .330 .480 .275
2022 LHP 72 121 34 4 2 6 18 14 21 .854 .358 .496 .281
2022 RHP 129 403 108 18 4 16 74 41 73 .784 .333 .452 .268
2023 AHP 32 92 20 2 3 6 17 9 24 .787 .287 .500 .217
2023 HHP 56 115 32 3 5 2 14 9 31 .774 .331 .443 .278
2023 LHP 21 35 13 1 3 2 12 3 4 1.164 .421 .743 .371
2023 RHP 79 172 39 4 5 6 19 15 51 .702 .289 .413 .227
2024 AHP 35 132 37 7 1 3 19 8 20 .736 .319 .417 .280
2024 HHP 29 97 33 5 1 5 20 12 11 .969 .402 .567 .340
2024 LHP 36 59 16 5 0 0 5 2 8 .646 .290 .356 .271
2024 RHP 54 170 54 7 2 8 34 18 23 .900 .377 .524 .318
2025 AHP 7 6 2 1 0 0 1 1 0 .929 .429 .500 .333
2025 HHP 1 1 0 0 0 0 0 0 0 .000 .000 .000 .000
2025 LHP 3 3 1 1 0 0 0 0 0 1.000 .333 .667 .333
2025 RHP 5 4 1 0 0 0 1 1 0 .650 .400 .250 .250
Total AHP 465 1840 450 81 14 53 201 195 364 .710 .319 .390 .245
Total HHP 469 1787 486 80 29 49 201 166 359 .764 .333 .431 .272
Total LHP 390 869 219 37 12 28 100 76 166 .732 .313 .419 .252
Total RHP 837 2758 717 124 31 74 302 285 557 .738 .330 .408 .260
Total 934 3627 936 161 43 102 402 361 723 .737 .326 .411 .258
Career Transactions
DateTransaction
2025-11-01Koichi Yamanaka has retired from the Philadelphia Jesuits
2022-05-07Trade #1361901 has been completed between the Philadelphia Jesuits and the Boston Patriots. The Boston Patriots receive Hod Bauer, Draft Pick 2025 Round 2 PHI (Brad Pascual), Draft Pick 2024 Round 2 PHI (Bryan Taylor) from the Philadelphia Jesuits in exchange for Koichi Yamanaka.
2022-05-05The Boston Patriots have placed Koichi Yamanaka on the trade block.
2018-06-08Koichi Yamanaka of the Boston Patriots is injured and is expected to be out 9 days.
2017-06-26Koichi Yamanaka of the Boston Patriots is injured and is expected to be out 24 days.
2017-04-21The Boston Patriots have promoted Koichi Yamanaka to the major league team. The Boston Patriots have promoted Phil Poholsky to the major league team. The Boston Patriots have sent Dick Jones to the minors. The Boston Patriots have waived John Force.