P Masato Koyama #22
Yomiuri Giants Pro Feeder
Age: 19 | Bats: L | Throws: L | Morale: Good    
12/31/2025
BNN Index | Pro Feeder | SCORES | STANDINGS | STATS | TEAMS | PLAYERS | TRANSACTIONS | HISTORY
P MASATO KOYAMA #22 - AGE: 19 - BATS: L - THROWS: L - MORALE: GOOD
G GS Rec SV ERA IP HA HR BB K WHIP WAR
9 9 3-2 0 2.96 45.2 52 4 11 47 1.38 1.6
PITCHING RATINGS (OSA)
Pot. Overall Vs Left Vs Right Pot.
Stuff 11
Movement 30
Control 60
PITCHING RATINGS
Pitch Cur. Pot.
Fastball - 34
Slider - 31
Changeup - 68
 
 
OTHER PITCHING RATINGS
Velocity 85-87 Mph
Stamina 45
Suggested Role Starter
Groundball Percentage 51 %
Hold Runners 100
Defense 52
RUN/BUNT RATINGS
Running Speed: 15
Stealing Ability: 6
Baserunning Inst.: 11
Sacrifice Bunt: 64
Bunt for Hit: 1
   
GAME LOG, LAST 10 GAMES
Date Vs. Result Start IP H R ER BB K Dec
08/17/2025 TOK Loss, 3-5 X 4.2 7 3 3 0 4 Loss
08/12/2025 @ YOK Loss, 2-3 X 4.2 6 1 1 1 4
08/03/2025 YOK Win, 9-5 X 5.2 5 3 3 3 8
07/27/2025 @ TOK Loss, 4-11 X 4.2 9 5 5 1 4 Loss
07/19/2025 TOK Win, 2-1 X 6.0 5 1 0 1 7 Win
07/13/2025 @ YOK Win, 10-2 X 5.0 3 1 0 0 8 Win
07/02/2025 CHU Win, 7-5 X 4.2 6 3 2 2 3
06/22/2025 YOK Win, 4-3 X 5.1 4 1 1 1 5 Win
06/08/2025 CHU Win, 2-1 X 5.0 7 0 0 2 4
PERSONALITY
Leader Ability:Low
Loyalty:Very High
Desire f. Win:Low
Greed:High
Intelligence:Very High
Work Ethic:High
Birthday:11/08/2006
Born in:Tsuchiura, IBA
Nationality:Japanese
Height:5' 11"
Weight:170 lbs
Local Popularity:Unknown
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:None
Arbitration Eligibility:Not yet eligible
Option Years:3 option years left
Contract Extension: -
Drafted:-
NIPPON BASEBALL LEAGUE 2025 PITCHING STATS
Pitching G GS W L SV ERA IP HA R ER HR BB K CG CG% SHO QS QS%
Overall 9 9 3 2 0 2.96 45.2 52 18 15 4 11 47 0 0.0 0 1 11.1
Pitching SVO BS SV% RA GF R/9 H/9 K/9 BB/9 FIP WHIP FIP- WAR BABIP        
Overall 0 0 0.0 0 0 12.42 10.25 9.26 2.17 3.26 1.38 62 1.6 .356        
Pitching AB H 2B 3B HR R BB K SF SH HP AVG OBP SLG OPS      
vs. LHB 39 12 4 0 0 5 1 10 0 0 0 .308 .325 .410 .735      
vs. RHB 147 40 8 0 4 13 10 37 0 0 0 .272 .318 .408 .727      
NIPPON BASEBALL LEAGUE 2025 PITCHING SPLITS
Split G GS W L SV ERA IP HA R ER HR BB K  
June 2 2 1 0 0 0.87 10.1 11 1 1 0 3 9  
July 4 4 2 1 0 3.10 20.1 23 10 7 1 4 22  
August 3 3 0 1 0 4.20 15.0 18 7 7 3 4 16  
Career 9 9 3 2 0 2.96 45.2 52 18 15 4 11 47  
Home 6 6 2 1 0 2.59 31.1 34 11 9 4 9 31  
Road 3 3 1 1 0 3.77 14.1 18 7 6 0 2 16  
Grass 3 3 1 1 0 3.77 14.1 18 7 6 0 2 16  
Turf 6 6 2 1 0 2.59 31.1 34 11 9 4 9 31  
Day 7 7 3 2 0 3.50 36.0 39 17 14 4 8 39  
Night 2 2 0 0 0 0.93 9.2 13 1 1 0 3 8  
As Starter 9 9 3 2 0 2.96 45.2 52 18 15 4 11 47  
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+
2025 Yomiuri - COL 18 9 9 3 2 0 2.96 45.2 52 18 15 4 11 47 0 0 1.38 .356 3.26 1.6 179
Total Pro Feeder 9 9 3 2 0 2.96 45.2 52 18 15 4 11 47 0 0 1.38 .356 3.26 179.4
CAREER FIELDING STATS
Year/Team/League POS G GS PO A DP TC E PCT INN RNG ZR EFF PB RSTA RTO RTO%
2025 Yomiuri - COL P 9 9 1 7 0 8 0 1.000 45.2 1.58 +0.4 1.031
TOTAL P 9 9 1 7 0 8 0 1.000 45.2 1.58 +0.4 1.031
PLAYER HISTORY
06/07/2025 Joined the Yomiuri Giants.
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