P Yoshiki Yamaguchi #20
South Bay Arsenal (MAN) AAA
Age: 22 | Bats: S | Throws: L | Morale: Very Unhappy    
12/31/2025
BNN Index | AAA | SCORES | STANDINGS | STATS | TEAMS | PLAYERS | TRANSACTIONS | HISTORY
P YOSHIKI YAMAGUCHI #20 - AGE: 22 - BATS: S - THROWS: L - MORALE: VERY UNHAPPY
G GS Rec SV ERA IP HA HR BB K WHIP WAR
40 0 2-1 5 4.68 32.2 29 3 24 28 1.62 -0.0
PITCHING RATINGS (OSA)
Pot. Overall Vs Left Vs Right Pot.
Stuff 61
Movement 47
Control 39
PITCHING RATINGS
Pitch Cur. Pot.
Slider - 29
Changeup - 84
Sinker - 62
Splitter - 46
 
OTHER PITCHING RATINGS
Velocity 92-94 Mph
Stamina 43
Suggested Role Starter
Groundball Percentage 66 %
Hold Runners 55
Defense 65
RUN/BUNT RATINGS
Running Speed: 4
Stealing Ability: 11
Baserunning Inst.: 6
Sacrifice Bunt: 83
Bunt for Hit: 1
   
GAME LOG, LAST 10 GAMES
Date Vs. Result Start IP H R ER BB K Dec
09/15/2026 @ ARL Loss, 0-0 0.1 0 0 0 0 0
09/08/2026 @ ACA Loss, 0-0 0.2 0 0 0 0 1
09/05/2026 @ AMA Loss, 0-0 1.0 3 3 3 1 2
09/05/2026 @ IND Loss, 0-0 0.2 1 0 0 0 0
09/02/2026 @ MUN Loss, 0-0 0.1 1 0 0 1 1
08/23/2026 @ ARL Loss, 0-0 1.0 0 0 0 1 2
08/21/2026 @ CHA Loss, 0-0 0.1 2 2 2 2 0
08/17/2026 @ MUN Loss, 0-0 1.0 0 0 0 2 2
08/14/2026 @ AMA Loss, 0-0 0.2 0 0 0 0 1
08/12/2026 AMA Loss, 0-0 0.0 1 0 0 0 0
PERSONALITY
Leader Ability:Very High
Loyalty:Very Low
Desire f. Win:Low
Greed:High
Intelligence:High
Work Ethic:Low
Birthday:03/24/2003
Born in:Tanashi, TOK
Nationality:Japanese
Height:6' 3"
Weight:195 lbs
Local Popularity:Insignificant
National Pop.:Unknown
STATUS
Contract:Minor League Contract
Salary:-
Signed Through:-
Major Service:None, None
Service This Yr:None
40-Man Service:None, None
Pro Service:3 Years
Arbitration Eligibility:Not yet eligible
Option Years:3 option years left
Contract Extension: -
Drafted:-
TRIPLE A 2025 PITCHING STATS
Pitching G GS W L SV ERA IP HA R ER HR BB K CG CG% SHO QS QS%
Overall 40 0 2 1 5 4.68 32.2 29 17 17 3 24 28 0 0.0 0 0 0.0
Pitching SVO BS SV% RA GF R/9 H/9 K/9 BB/9 FIP WHIP FIP- WAR BABIP        
Overall 14 0 100.0 40 18 14.88 7.99 7.71 6.61 5.36 1.62 107 -0.0 .299        
Pitching AB H 2B 3B HR R BB K SF SH HP AVG OBP SLG OPS      
vs. LHB 43 10 3 0 2 7 5 13 0 0 1 .233 .327 .442 .768      
vs. RHB 73 19 6 0 1 10 19 15 2 3 0 .260 .404 .384 .788      
TRIPLE A 2025 PITCHING SPLITS
Split G GS W L SV ERA IP HA R ER HR BB K  
April 4 0 0 0 2 10.80 3.1 5 4 4 1 3 1  
May 4 0 0 0 0 3.00 3.0 2 1 1 0 2 2  
June 9 0 0 0 2 2.00 9.0 3 2 2 1 3 9  
July 10 0 1 0 1 4.50 8.0 9 4 4 0 6 4  
August 8 0 1 1 0 4.26 6.1 5 3 3 0 8 8  
September 5 0 0 0 0 9.00 3.0 5 3 3 1 2 4  
Last Year 44 0 4 4 15 3.53 51.0 44 24 20 1 35 48  
2 Years Ago 29 23 8 11 0 7.30 127.0 158 115 103 10 89 77  
Career 113 23 14 16 20 5.98 210.2 231 156 140 14 148 153  
Home 4 0 0 0 0 4.91 3.2 4 2 2 1 2 4  
Road 6 0 0 0 1 0.00 4.0 0 0 0 0 4 5  
Grass 38 0 2 1 4 4.45 30.1 27 15 15 3 21 26  
Turf 2 0 0 0 1 7.71 2.1 2 2 2 0 3 2  
Day 15 0 1 0 2 3.55 12.2 8 5 5 1 11 12  
Night 25 0 1 1 3 5.40 20.0 21 12 12 2 13 16  
As Reliever / Substitution 40 0 2 1 5 4.68 32.2 29 17 17 3 24 28  
CAREER PITCHING STATS
Year/Team/League Age G GS W L SV ERA IP HA R ER HR BB K CG SHO WHIP BABIP FIP WAR ERA+
CAREER MINOR LEAGUE PITCHING STATS
Year/Team/League Age G GS W L SV ERA IP HA R ER HR BB K CG SHO WHIP BABIP FIP WAR ERA+
2022 Beach City - A 19 48 3 8 1 5 4.09 105.2 102 48 48 8 58 125 0 0 1.51 .352 4.21 1.6 115
2023 South Bay - AAA 20 29 23 8 11 0 7.30 127.0 158 115 103 10 89 77 0 0 1.94 .347 5.89 0.7 71
2024 West Coast - AA 21 4 4 2 2 0 2.16 25.0 25 6 6 1 11 16 0 0 1.44 .312 4.18 0.5 224
2024 South Bay - AAA 21 44 0 4 4 15 3.53 51.0 44 24 20 1 35 48 0 0 1.55 .321 3.97 0.7 141
2025 South Bay - AAA 22 40 0 2 1 5 4.68 32.2 29 17 17 3 24 28 0 0 1.62 .299 5.36 -0.0 106
Total AAA 113 23 14 16 20 5.98 210.2 231 156 140 14 148 153 0 0 1.80 .335 5.34 93.2
Total AA 4 4 2 2 0 2.16 25.0 25 6 6 1 11 16 0 0 1.44 .312 4.18 223.6
Total A 48 3 8 1 5 4.09 105.2 102 48 48 8 58 125 0 0 1.51 .352 4.21 114.9
CAREER FIELDING STATS
Year/Team/League POS G GS PO A DP TC E PCT INN RNG ZR EFF PB RSTA RTO RTO%
2022 Beach City - A P 48 3 8 20 4 28 0 1.000 105.2 2.38 +0.9 1.017
2023 South Bay - AAA P 29 23 8 22 2 31 1 .968 127.0 2.13 +1.1 1.059
2024 South Bay - AAA P 42 0 5 9 0 14 0 1.000 51.0 2.47 +0.4 1.039
2024 West Coast - AA P 4 4 0 4 2 4 0 1.000 25.0 1.44 +0.2 1.050
2025 South Bay - AAA P 39 0 2 7 0 9 0 1.000 32.2 2.48 +0.3 1.052
TOTAL P 162 30 23 62 8 86 1 .988 341.1 2.24 +3.0 1.041
PLAYER HISTORY
06/25/2019 Entered the ADULT BASEBALL LEAGUE as an international amateur free agent from Japan.
06/30/2019 Signed a minor league contract ($222,000 bonus) out of Japan with the Manhatten Beach Patriots organization.
01/01/2020 OSA scouting updated ratings (potential): Stuff: - (11); Movement: - (14); Control: - (11).
01/01/2021 OSA scouting updated ratings (potential): Stuff: - (11); Movement: - (14); Control: - (11).
01/01/2022 OSA scouting updated ratings (potential): Stuff: - (8); Movement: - (11); Control: - (10).
01/01/2023 OSA scouting updated ratings (potential): Stuff: - (36); Movement: - (54); Control: - (46).
01/01/2024 OSA scouting updated ratings (potential): Stuff: - (56); Movement: - (48); Control: - (51).
01/01/2025 OSA scouting updated ratings (potential): Stuff: - (57); Movement: - (49); Control: - (47).
07/12/2025 Injured (torn rotator cuff), out for 6 months.
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