P Jeff Kosowski #34
San Francisco Giants MLB
Age: 24 | Bats: L | Throws: R | Morale: Normal
06/01/2026
BNN Index | MLB | SCORES | STANDINGS | STATS | TEAMS | PLAYERS | TRANSACTIONS | HISTORY
P JEFF KOSOWSKI #34 - AGE: 24 - BATS: L - THROWS: R - MORALE: NORMAL
G GS Rec SV ERA IP HA HR BB K WHIP WAR
17 0 4-2 0 5.29 17.0 16 4 8 15 1.41 -0.3
PITCHING RATINGS (OSA)
Overall Pot. Overall Vs Left Vs Right Pot.
Stuff 45 50 45 55
Movement 45 50 45 50
Control 40 40 40 40
PITCHING RATINGS
Pitch Cur. Pot.
Curveball 45 50
Changeup 45 50
Splitter 55 80
Cutter 50 55
 
OTHER PITCHING RATINGS
Velocity 92-94 Mph
Stamina 60
Suggested Role Starter
Type Flyball Pitcher
Hold Runners 65
Defense 60
RUN/BUNT RATINGS
Running Speed: 25
Stealing Ability: 20
Baserunning Inst.: 20
Sacrifice Bunt: 80
Bunt for Hit: 25
   
GAME LOG, LAST 10 GAMES
Date Vs. Result Start IP H R ER BB K Dec
05/30/2026 BOS Win, 3-2 2.0 2 0 0 1 3 Win
05/29/2026 BOS Loss, 1-2 1.0 0 0 0 0 0
05/27/2026 WSH Win, 6-4 1.0 0 0 0 1 1
05/20/2026 @ SEA Loss, 7-8 1.0 0 0 0 1 1
05/19/2026 @ SEA Loss, 4-6 0.1 2 4 4 2 1 Loss
05/17/2026 ARI Loss, 4-5 1.0 1 0 0 1 1
05/14/2026 CLE Loss, 2-7 1.0 0 0 0 0 1
05/08/2026 @ SD Loss, 3-4 0.1 0 0 0 0 0
05/07/2026 @ SD Loss, 6-8 0.1 3 3 3 0 0
04/24/2026 LKW Loss, 3-4 1.0 0 0 0 0 0
PERSONALITY
Birthday:06/08/2001
Born in:Terrell, TX
Nationality:American
Height:6' 4"
Weight:215 lbs
Local Popularity:Unknown
National Pop.:Unknown
STATUS
Contract:Major League Contract
Salary:$740,000
Signed Through:2026 Season
Major Service:3 Years, 95 Days
Service This Yr:69 Days
40-Man Service:4 Years, 142 Days
Pro Service:6 Years
Arbitration Eligibility:Arbitration eligible in offseason
Option Years:3 option years left
Contract Extension: -
Drafted:-
MAJOR LEAGUE BASEBALL 2026 PITCHING STATS
Pitching G GS W L SV ERA IP HA R ER HR BB K CG CG% SHO QS QS%
Overall 17 0 4 2 0 5.29 17.0 16 10 10 4 8 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 2 0.0 17 6 12.71 8.47 7.94 4.24 5.62 1.41 137 -0.3 .255        
Pitching AB H 2B 3B HR R BB K SF SH HP AVG OBP SLG OPS      
vs. LHB 19 2 0 0 1 3 4 5 0 0 0 .105 .261 .263 .524      
vs. RHB 47 14 1 0 3 7 4 10 0 0 0 .298 .353 .511 .864      
MAJOR LEAGUE BASEBALL 2026 PITCHING SPLITS
Split G GS W L SV ERA IP HA R ER HR BB K  
Last Week 3 0 1 0 0 0.00 4.0 2 0 0 0 2 4  
April 8 0 3 1 0 3.00 9.0 8 3 3 2 2 7  
May 9 0 1 1 0 7.88 8.0 8 7 7 2 6 8  
Spring Training 10 0 1 2 1 6.60 15.0 22 11 11 4 4 11  
Career 17 0 4 2 0 5.29 17.0 16 10 10 4 8 15  
Home 10 0 3 0 0 0.77 11.2 9 1 1 1 4 11  
Road 7 0 1 2 0 15.19 5.1 7 9 9 3 4 4  
Grass 16 0 4 2 0 5.74 15.2 16 10 10 4 7 15  
Turf 1 0 0 0 0 0.00 1.1 0 0 0 0 1 0  
Day 8 0 2 1 0 6.48 8.1 11 6 6 3 3 9  
Night 9 0 2 1 0 4.15 8.2 5 4 4 1 5 6  
As Reliever / Substitution 17 0 4 2 0 5.29 17.0 16 10 10 4 8 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+
2026 San Francisco - MLB 24 17 0 4 2 0 5.29 17.0 16 10 10 4 8 15 0 0 1.41 .255 5.62 -0.3 78
Total MLB 17 0 4 2 0 5.29 17.0 16 10 10 4 8 15 0 0 1.41 .255 5.62 -0.3 78
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 Hudson Valley - A 23 6 6 3 1 0 2.65 37.1 38 12 11 5 10 31 0 0 1.29 .295 4.28 0.5 159
2025 Somerset - AA 23 5 5 3 0 0 1.49 36.1 35 6 6 4 7 35 0 0 1.16 .316 3.15 1.2 324
2025 Scranton WB - AAA 23 18 18 7 5 0 3.29 109.1 106 45 40 12 31 86 0 0 1.25 .288 3.75 2.0 125
Total IL 18 18 7 5 0 3.29 109.1 106 45 40 12 31 86 0 0 1.25 .288 3.75 125.2
Total EL 5 5 3 0 0 1.49 36.1 35 6 6 4 7 35 0 0 1.16 .316 3.15 323.9
Total SAL 6 6 3 1 0 2.65 37.1 38 12 11 5 10 31 0 0 1.29 .295 4.28 159.4
CAREER FIELDING STATS
Year/Team/League POS G GS PO A DP TC E PCT INN RNG ZR EFF PB RSTA RTO RTO%
2026 San Francisco - MLB P 17 0 0 1 0 1 0 1.000 17.0 0.53 +0.2 .990
TOTAL P 17 0 0 1 0 1 0 1.000 17.0 0.53 +0.2 .990
PLAYER HISTORY
02/19/2025 Signed a 1-year minor league contract with the New York Yankees organization.
12/15/2025 Added to the secondary (40-man) roster for the New York Yankees.
01/01/2026 OSA scouting updated ratings (potential): Stuff: 45 (55); Movement: 45 (50); Control: 40 (40).
02/06/2026 Designated for assignment and placed on waivers by the New York Yankees.
02/09/2026 Was claimed off waivers by San Francisco while with New York.
Thursday, February 26th , 2026 - OOTP Baseball 26.8 Build 82