P Seiichi Yamaguchi #17
Newport Unicorns (BOS) A-
Age: 21 | Bats: L | Throws: L | Morale: Very Unhappy
06/14/2026
 OA: 20 POT: 40
BNN Index | A- | SCORES | STANDINGS | STATS | TEAMS | PLAYERS | TRANSACTIONS | HISTORY
P SEIICHI YAMAGUCHI #17 - AGE: 21 - BATS: L - THROWS: L - MORALE: VERY UNHAPPY
G GS Rec SV ERA IP HA HR BB K WHIP WAR
20 0 0-2 1 7.15 34.0 43 9 10 15 1.56 -0.4
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 65
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 Bullpen
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
06/08/2026 AUR Loss, 6-15 2.0 2 0 0 0 0
06/06/2026 AUR Loss, 4-9 3.0 3 1 1 0 1
06/04/2026 @ JUL Loss, 3-9 1.0 0 0 0 1 0
05/31/2026 PRO Win, 4-3 1.1 0 0 0 1 0
05/26/2026 OTA Win, 4-3 1.2 0 0 0 0 1
05/23/2026 MED Loss, 2-8 1.2 5 3 3 0 0
05/20/2026 @ SABA Loss, 0-10 2.2 6 3 3 0 2
05/16/2026 PIK Loss, 1-5 4.0 1 0 0 0 3
05/12/2026 @ TAC Loss, 7-9 0.2 0 0 0 0 0
05/07/2026 @ GRE Loss, 6-10 2.0 0 0 0 1 1
PERSONALITY
Nothing stands out about Yamaguchi.
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:3 Years
Arbitration Eligibility:Not yet eligible
Option Years:3 option years left
Contract Extension: -
Drafted:-
ABA CLASS A- 2026 PITCHING STATS
Pitching G GS W L SV ERA IP HA R ER HR BB K CG CG% SHO QS QS%
Overall 20 0 0 2 1 7.15 34.0 43 28 27 9 10 15 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 2 1 50.0 20 9 14.03 11.38 3.97 2.65 6.91 1.56 126 -0.4 .298        
Pitching AB H 2B 3B HR R BB K SF SH HP AVG OBP SLG OPS      
vs. LHB 30 9 2 0 2 5 3 4 1 0 0 .300 .353 .567 .920      
vs. RHB 107 34 4 2 7 23 7 11 0 0 0 .318 .360 .589 .948      
ABA CLASS A- 2026 PITCHING SPLITS
Split G GS W L SV ERA IP HA R ER HR BB K  
This Week 1 0 0 0 0 0.00 2.0 2 0 0 0 0 0  
Last Week 2 0 0 0 0 2.25 4.0 3 1 1 1 1 1  
April 9 0 0 2 1 13.91 11.0 22 17 17 6 6 5  
May 8 0 0 0 0 4.76 17.0 16 10 9 2 3 9  
June 3 0 0 0 0 1.50 6.0 5 1 1 1 1 1  
Last Year 10 0 2 0 0 5.64 22.1 19 14 14 4 7 13  
Career 30 0 2 2 1 6.55 56.1 62 42 41 13 17 28  
Home 9 0 0 0 0 3.57 17.2 17 7 7 2 3 9  
Road 11 0 0 2 1 11.02 16.1 26 21 20 7 7 6  
Grass 16 0 0 2 1 5.86 27.2 29 19 18 6 6 13  
Turf 4 0 0 0 0 12.79 6.1 14 9 9 3 4 2  
Day 5 0 0 0 0 10.80 6.2 13 8 8 1 3 1  
Night 15 0 0 2 1 6.26 27.1 30 20 19 8 7 14  
As Reliever / Substitution 20 0 0 2 1 7.15 34.0 43 28 27 9 10 15  
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 6.32 0.7 116
2025 Newport - A- 20 10 0 2 0 0 5.64 22.1 19 14 14 4 7 13 0 0 1.16 .221 5.93 0.1 108
2026 Newport - A- 21 20 0 0 2 1 7.15 34.0 43 28 27 9 10 15 0 0 1.56 .298 6.91 -0.4 76
Total AR 40 17 6 5 1 7.07 113.1 172 98 89 25 39 64 0 0 1.86 .360 6.84 88.4
Total A- 30 0 2 2 1 6.55 56.1 62 42 41 13 17 28 0 0 1.40 .269 6.52 86.0
CAREER FIELDING STATS
Year/Team/League POS G GS PO A DP TC E PCT INN RNG ZR EFF PB RSTA RTO RTO%
2026 Newport - A- P 19 0 2 1 0 3 0 1.000 34.0 0.79 +0.6 .000
TOTAL P 19 0 2 1 0 3 0 1.000 34.0 0.79 +0.6 .000
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.
01/01/2026 OSA scouting updated ratings (potential): Stuff: 30 (40); Movement: 20 (45); Control: 30 (70).
05/12/2026 Injured (mild hamstring strain),day-to-day for 4 days.
Friday, May 8th , 2026 - OOTP Baseball 26.8 Build 82