P Seiichi Yamaguchi #17
Newport Unicorns (BOS) A-
Age: 21 | Bats: L | Throws: L | Morale: Very Unhappy
10/14/2026
 OA: 20 POT: 35
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
44 0 2-4 1 8.14 69.2 101 18 28 26 1.85 -1.2
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 60
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
09/07/2026 SABA Win, 10-8 0.1 2 2 0 0 0
08/31/2026 TAC Win, 8-5 2.0 2 2 2 2 0 Win
08/28/2026 @ LR Loss, 1-12 3.0 6 3 0 1 2
08/21/2026 AUR Win, 9-7 0.2 2 2 1 4 0
08/14/2026 PRO Loss, 4-7 3.2 0 0 0 1 1
08/10/2026 @ SJ Win, 15-14 3.0 4 1 1 1 1 Win
08/07/2026 OTA Loss, 3-5 0.1 0 0 0 0 0
08/04/2026 MED Loss, 3-14 2.0 3 2 2 1 3
07/31/2026 @ SABA Loss, 3-5 2.1 0 0 0 0 0
07/27/2026 @ TAC Loss, 3-6 3.0 3 1 1 1 3
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 44 0 2 4 1 8.14 69.2 101 73 63 18 28 26 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 5 4 20.0 44 19 17.05 13.05 3.36 3.62 7.43 1.85 139 -1.2 .329        
Pitching AB H 2B 3B HR R BB K SF SH HP AVG OBP SLG OPS      
vs. LHB 76 25 5 0 3 18 8 7 1 0 1 .329 .395 .513 .909      
vs. RHB 218 76 14 4 15 55 20 19 1 0 2 .349 .407 .656 1.063      
ABA CLASS A- 2026 PITCHING SPLITS
Split G GS W L SV ERA IP HA R ER HR BB K  
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 9 0 0 1 0 11.91 11.1 24 18 15 4 5 1  
July 10 0 0 1 0 9.39 15.1 20 16 16 5 4 4  
August 7 0 2 0 0 3.68 14.2 17 10 6 1 10 7  
September 1 0 0 0 0 0.00 0.1 2 2 0 0 0 0  
Last Year 10 0 2 0 0 5.64 22.1 19 14 14 4 7 13  
Career 54 0 4 4 1 7.53 92.0 120 87 77 22 35 39  
Home 19 0 1 0 0 5.74 31.1 37 23 20 4 12 14  
Road 25 0 1 4 1 10.10 38.1 64 50 43 14 16 12  
Grass 37 0 2 4 1 7.39 59.2 82 59 49 13 23 24  
Turf 7 0 0 0 0 12.60 10.0 19 14 14 5 5 2  
Day 11 0 2 0 0 11.57 14.0 27 20 18 4 7 2  
Night 33 0 0 4 1 7.28 55.2 74 53 45 14 21 24  
As Reliever / Substitution 44 0 2 4 1 8.14 69.2 101 73 63 18 28 26  
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 44 0 2 4 1 8.14 69.2 101 73 63 18 28 26 0 0 1.85 .329 7.43 -1.2 65
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- 54 0 4 4 1 7.53 92.0 120 87 77 22 35 39 0 0 1.68 .306 7.07 72.4
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 43 0 3 4 0 7 0 1.000 69.2 0.90 +0.9 1.017
TOTAL P 43 0 3 4 0 7 0 1.000 69.2 0.90 +0.9 1.017
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, June 19th , 2026 - OOTP Baseball 26.8 Build 82