Zack Kelly 2025 season stats

Zack Kelly played 28 games for the Boston Red Sox in the 2025 MLB regular season, with 1 win, a 4.58 ERA and 35 strikeouts.

All Zack Kelly seasonsBoston Red Sox

2025 regular season

GP
28
R
21
H
35
K
35
L
3
W
1
BB
12
ER
18
GS
0
IP
35.1
SV
0
W%
0.3

2025 postseason

GP
1
R
0
H
0
K
1
L
0
W
0
BB
0
ER
0
GS
0
IP
0.1
SV
0
W%
0.0

2025 splits

Totals, from the 28 regular-season games in the log.

Zack Kelly, 2025 splits
GP: Games the player appeared in, however briefly.IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.H: Times the batter reached base by hitting the ball, without help from an error.R: Runs — scored by the batter, or allowed by the pitcher.ER: Earned runs allowed — runs that scored without help from an error.BB: Times the batter reached first base on four balls.K: Batters this pitcher struck out.HR: Home runs hit.ERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent.
All games2835.1352118123534.58
Home1316.11712991304.96
Away1519.0189932234.26
Wins1110.211442903.38
Losses1724.2241714102635.11
March12.01000100.00
April68.0111010210111.25
May12.01211004.50
June910.2115361412.53
September1112.2114431012.84

What the columns mean: IP · H · R · BB · K · HR · ERA

By opponent

Zack Kelly, 2025, by opponent
GP: Games the player appeared in, however briefly.IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.H: Times the batter reached base by hitting the ball, without help from an error.R: Runs — scored by the batter, or allowed by the pitcher.ER: Earned runs allowed — runs that scored without help from an error.BB: Times the batter reached first base on four balls.K: Batters this pitcher struck out.HR: Home runs hit.ERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent.
vs ARI10.121111027.00
vs ATH32.22000400.00
vs BAL23.01211003.00
vs CHW21.225513127.00
vs CLE14.02000400.00
vs DET22.01000000.00
vs LAA22.22101400.00
vs NYY33.14002400.00
vs SEA11.20000200.00
vs SF22.03111214.50
vs STL11.02110109.00
vs TB45.26653607.94
vs TEX12.01000100.00
vs TOR33.174423110.80

What the columns mean: IP · H · R · BB · K · HR · ERA

2025 games

Zack Kelly, last 15 games, 2025 regular season
IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.H: Times the batter reached base by hitting the ball, without help from an error.R: Runs — scored by the batter, or allowed by the pitcher.ER: Earned runs allowed — runs that scored without help from an error.BB: Times the batter reached first base on four balls.K: Batters this pitcher struck out.HR: Home runs hit.
Sep 28, 2025vs DETW 4-31.0000000
Sep 26, 2025vs DETW 4-31.0100000
Sep 25, 2025@ TORL 6-10.2111001
Sep 21, 2025@ TBL 7-31.0222010
Sep 19, 2025@ TBW 11-71.0000000
Sep 17, 2025vs ATHW 5-4 F/100.2100010
Sep 16, 2025vs ATHL 2-11.0100030
Sep 12, 2025vs NYYL 4-11.0100200
Sep 8, 2025@ ATHW 7-01.0000000
Sep 7, 2025@ ARIW 7-40.1211110
Sep 3, 2025vs CLEL 8-14.0200040
Jun 29, 2025vs TORL 5-31.0211110
Jun 25, 2025@ LAAL 5-21.2200040
Jun 22, 2025@ SFL 9-51.1311001
Jun 20, 2025@ SFW 7-50.2000120

What the columns mean: IP · H · R · BB · K · HR

All 28 gamesOnly the last 15 games
Zack Kelly, game by game, 2025 regular season
IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.H: Times the batter reached base by hitting the ball, without help from an error.R: Runs — scored by the batter, or allowed by the pitcher.ER: Earned runs allowed — runs that scored without help from an error.BB: Times the batter reached first base on four balls.K: Batters this pitcher struck out.HR: Home runs hit.
Sep 28, 2025vs DETW 4-31.0000000
Sep 26, 2025vs DETW 4-31.0100000
Sep 25, 2025@ TORL 6-10.2111001
Sep 21, 2025@ TBL 7-31.0222010
Sep 19, 2025@ TBW 11-71.0000000
Sep 17, 2025vs ATHW 5-4 F/100.2100010
Sep 16, 2025vs ATHL 2-11.0100030
Sep 12, 2025vs NYYL 4-11.0100200
Sep 8, 2025@ ATHW 7-01.0000000
Sep 7, 2025@ ARIW 7-40.1211110
Sep 3, 2025vs CLEL 8-14.0200040
Jun 29, 2025vs TORL 5-31.0211110
Jun 25, 2025@ LAAL 5-21.2200040
Jun 22, 2025@ SFL 9-51.1311001
Jun 20, 2025@ SFW 7-50.2000120
Jun 17, 2025@ SEAL 8-01.2000020
Jun 9, 2025vs TBL 10-8 F/111.0121310
Jun 8, 2025@ NYYW 11-70.1200000
Jun 6, 2025@ NYYL 9-62.0100040
Jun 3, 2025vs LAAL 4-3 F/101.0010100
May 25, 2025vs BALL 5-12.0121100
Apr 20, 2025vs CHWL 8-40.0133000
Apr 15, 2025@ TBW 7-42.2322040
Apr 12, 2025@ CHWL 3-21.2122131
Apr 8, 2025vs TORL 6-11.2422120
Apr 4, 2025vs STLW 13-91.0211010
Apr 3, 2025@ BALW 8-41.0000000
Mar 29, 2025@ TEXL 4-32.0100010

What the columns mean: IP · H · R · BB · K · HR

Source: ESPN public MLB data, 2025 season.