P Seiichi Yamaguchi #17
Newport Unicorns (BOS) A-
Age: 20 | Bats: L | Throws: L | Morale: Very Unhappy
09/17/2025
 OA: 20 POT: 40
BNN Index | A- | SCORES | STANDINGS | STATS | TEAMS | PLAYERS | TRANSACTIONS | HISTORY
P SEIICHI YAMAGUCHI #17 - AGE: 20 - BATS: L - THROWS: L - MORALE: VERY UNHAPPY
G GS Rec SV ERA IP HA HR BB K WHIP WAR
10 0 2-0 0 5.64 22.1 19 4 7 13 1.16 0.1
PITCHING RATINGS (OSA)
Overall Pot. Overall Vs Left Vs Right Pot.
Stuff 30 30 30 40
Movement 20 20 20 45
Control 30 30 30 70
PITCHING RATINGS
Pitch Cur. Pot.
Fastball 35 40
Curveball 30 45
Changeup 20 45
Forkball 30 45
 
OTHER PITCHING RATINGS
Velocity 90-92 Mph
Stamina 30
Suggested Role Strictly BP
Type Flyball Pitcher
Hold Runners 70
Defense 40
RUN/BUNT RATINGS
Running Speed: 45
Stealing Ability: 20
Baserunning Inst.: 35
Sacrifice Bunt: 65
Bunt for Hit: 25
   
GAME LOG, LAST 10 GAMES
Date Vs. Result Start IP H R ER BB K Dec
09/08/2025 @ SABA Loss, 2-9 1.0 0 0 0 0 0
09/07/2025 @ SABA Loss, 3-6 0.1 0 0 0 0 0
09/05/2025 GRE Win, 7-3 2.0 0 0 0 1 1
09/01/2025 @ PRO Win, 9-6 1.2 3 2 2 1 2
08/28/2025 AUR Loss, 2-7 2.2 3 1 1 0 1
08/25/2025 @ SJ Loss, 2-17 2.1 2 3 3 2 2
08/21/2025 @ OTA Loss, 9-13 3.0 5 4 4 1 2
08/16/2025 @ TAC Win, 20-7 4.0 2 2 2 0 4 Win
08/11/2025 JUL Loss, 8-9 3.0 2 1 1 2 1
08/04/2025 MED Win, 5-4 2.1 2 1 1 0 0 Win
PERSONALITY
A solid teammate.
Personality Class: Unknown
Birthday:05/31/2005
Born in:Saiki, OIT
Nationality:Japanese
Height:6' 7"
Weight:200 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:2 Years
Arbitration Eligibility:Not yet eligible
Option Years:3 option years left
Contract Extension: -
Drafted:-
ABA ROOKIE LEAGUE 2025 PITCHING STATS
Pitching G GS W L SV ERA IP HA R ER HR BB K CG CG% SHO QS QS%
Overall 15 11 3 3 0 5.46 56.0 86 41 34 7 17 23 0 0.0 0 1 9.1
Pitching SVO BS SV% RA GF BR/9 H/9 K/9 BB/9 FIP WHIP FIP- WAR BABIP        
Overall 0 0 0.0 4 2 16.88 13.82 3.70 2.73 6.44 1.84 96 0.8 .366        
Pitching AB H 2B 3B HR R BB K SF SH HP AVG OBP SLG OPS      
vs. LHB 69 25 3 1 2 12 7 3 0 0 1 .362 .429 .522 .950      
vs. RHB 176 61 15 1 5 29 10 20 1 3 1 .347 .383 .528 .911      
ABA ROOKIE LEAGUE 2025 PITCHING SPLITS
Split G GS W L SV ERA IP HA R ER HR BB K  
April 5 2 1 1 0 8.03 12.1 21 12 11 2 6 6  
May 5 5 1 1 0 5.40 25.0 37 16 15 4 6 9  
June 4 4 1 1 0 4.80 15.0 26 13 8 1 4 8  
July 1 0 0 0 0 0.00 3.2 2 0 0 0 1 0  
Last Year 25 6 3 2 1 8.63 57.1 86 57 55 18 22 41  
Career 40 17 6 5 1 7.07 113.1 172 98 89 25 39 64  
Home 6 4 2 1 0 4.71 21.0 27 11 11 4 5 11  
Road 9 7 1 2 0 5.91 35.0 59 30 23 3 12 12  
Grass 14 10 2 3 0 6.08 50.1 79 41 34 7 17 20  
Turf 1 1 1 0 0 0.00 5.2 7 0 0 0 0 3  
Day 5 3 2 0 0 1.08 16.2 20 2 2 1 1 10  
Night 10 8 1 3 0 7.32 39.1 66 39 32 6 16 13  
As Starter 11 11 3 3 0 6.10 48.2 79 39 33 6 15 19  
As Reliever / Substitution 4 0 0 0 0 1.23 7.1 7 2 1 1 2 4  
ABA CLASS A- 2025 PITCHING STATS
Pitching G GS W L SV ERA IP HA R ER HR BB K CG CG% SHO QS QS%
Overall 10 0 2 0 0 5.64 22.1 19 14 14 4 7 13 0 0.0 0 0 0.0
Pitching SVO BS SV% RA GF BR/9 H/9 K/9 BB/9 FIP WHIP FIP- WAR BABIP        
Overall 0 0 0.0 10 5 10.48 7.66 5.24 2.82 5.82 1.16 98 0.1 .221        
Pitching AB H 2B 3B HR R BB K SF SH HP AVG OBP SLG OPS      
vs. LHB 25 5 0 0 0 5 2 3 0 0 0 .200 .259 .200 .459      
vs. RHB 60 14 2 0 4 9 5 10 0 0 0 .233 .292 .467 .759      
ABA CLASS A- 2025 PITCHING SPLITS
Split G GS W L SV ERA IP HA R ER HR BB K  
Last Week 1 0 0 0 0 0.00 1.0 0 0 0 0 0 0  
August 6 0 2 0 0 6.23 17.1 16 12 12 3 5 10  
September 4 0 0 0 0 3.60 5.0 3 2 2 1 2 3  
Career 10 0 2 0 0 5.64 22.1 19 14 14 4 7 13  
Home 4 0 1 0 0 2.70 10.0 7 3 3 1 3 3  
Road 6 0 1 0 0 8.03 12.1 12 11 11 3 4 10  
Grass 6 0 2 0 0 4.41 16.1 11 8 8 2 5 9  
Turf 4 0 0 0 0 9.00 6.0 8 6 6 2 2 4  
Day 3 0 1 0 0 7.88 8.0 7 7 7 2 3 8  
Night 7 0 1 0 0 4.40 14.1 12 7 7 2 4 5  
As Reliever / Substitution 10 0 2 0 0 5.64 22.1 19 14 14 4 7 13  
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+
2024 Long Island - R 19 25 6 3 2 1 8.63 57.1 86 57 55 18 22 41 0 0 1.88 .354 7.35 -0.1 72
2025 Long Island - R 20 15 11 3 3 0 5.46 56.0 86 41 34 7 17 23 0 0 1.84 .366 6.44 0.8 122
2025 Newport - A- 20 10 0 2 0 0 5.64 22.1 19 14 14 4 7 13 0 0 1.16 .221 5.82 0.1 104
Total AR 40 17 6 5 1 7.07 113.1 172 98 89 25 39 64 0 0 1.86 .360 6.90 90.2
Total A- 10 0 2 0 0 5.64 22.1 19 14 14 4 7 13 0 0 1.16 .221 5.82 104.2
CAREER FIELDING STATS
Year/Team/League POS G GS PO A DP TC E PCT INN RNG ZR EFF PB RSTA RTO RTO%
2025 Newport - A- P 10 0 0 3 0 3 0 1.000 22.1 1.21 -0.1 1.008
2025 Long Island - R P 15 11 2 3 0 5 0 1.000 56.0 0.80 +1.6 1.521
TOTAL P 25 11 2 6 0 8 0 1.000 78.1 0.92 +1.5 1.213
PLAYER HISTORY
04/30/2022 Signed a minor league contract out of Japan with the Boston Whistlers organization.
01/01/2023 OSA scouting updated ratings (potential): Stuff: 30 (35); Movement: 30 (40); Control: 35 (50).
01/01/2023 OSA scouting updated ratings (potential): Stuff: 30 (35); Movement: 30 (40); Control: 35 (50).
01/01/2024 OSA scouting updated ratings (potential): Stuff: 20 (40); Movement: 20 (40); Control: 30 (65).
01/01/2025 OSA scouting updated ratings (potential): Stuff: 30 (40); Movement: 20 (45); Control: 30 (75).
06/17/2025 Injured (partially torn labrum),out for 6 weeks.
Monday, March 9th , 2026 - OOTP Baseball 26.8 Build 82