Isaac Mattson 2025 season stats

Isaac Mattson played 44 games for the Pittsburgh Pirates in the 2025 MLB regular season, with 3 wins, a 2.45 ERA and 45 strikeouts.

All Isaac Mattson seasonsPittsburgh Pirates

2025 regular season

GP
44
R
14
H
35
K
45
L
3
W
3
BB
19
ER
13
GS
0
IP
47.2
SV
0
W%
0.5

2025 splits

Totals, from the 44 regular-season games in the log.

Isaac Mattson, 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 games4447.2351413194542.45
Home2222.01466102412.45
Away2225.2218792132.45
Wins2223.2186662422.28
Losses2224.01787132122.63
May33.01111413.00
June811.252221211.54
July1110.2113351412.53
August1211.272251101.54
September1010.211656414.22

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

By opponent

Isaac Mattson, 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 ARI11.02000100.00
vs ATH11.00000000.00
vs ATL11.02110009.00
vs BAL22.03112104.50
vs BOS11.01000100.00
vs CHC46.14113201.42
vs CHW21.122211013.50
vs CIN43.12112312.70
vs COL22.00001200.00
vs DET21.232202110.80
vs KC21.03111119.00
vs LAD22.03220109.00
vs MIA12.00000300.00
vs MIL66.22113911.35
vs NYM11.11000300.00
vs PHI11.00000100.00
vs SEA11.10000300.00
vs SF33.14111502.70
vs STL44.01003300.00
vs TEX11.11001100.00
vs TOR11.00000100.00
vs WSH12.01101100.00

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

2025 games

Isaac Mattson, 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 26, 2025@ ATLW 9-31.0211000
Sep 24, 2025@ CINW 4-3 F/110.2111101
Sep 23, 2025@ CINW 4-21.0100000
Sep 19, 2025vs ATHL 4-31.0000000
Sep 14, 2025@ WSHL 4-32.0110110
Sep 10, 2025@ BALL 2-1 F/101.0311000
Sep 9, 2025@ BALL 3-2 F/111.0000210
Sep 7, 2025vs MILL 10-21.0000210
Sep 3, 2025vs LADW 3-01.0000010
Sep 2, 2025vs LADW 9-71.0322000
Aug 29, 2025@ BOSW 4-21.0100010
Aug 27, 2025@ STLW 2-11.0000010
Aug 26, 2025@ STLW 8-31.0000010
Aug 24, 2025vs COLW 4-01.0000010
Aug 20, 2025vs TORW 2-11.0000010

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

All 44 gamesOnly the last 15 games
Isaac Mattson, 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 26, 2025@ ATLW 9-31.0211000
Sep 24, 2025@ CINW 4-3 F/110.2111101
Sep 23, 2025@ CINW 4-21.0100000
Sep 19, 2025vs ATHL 4-31.0000000
Sep 14, 2025@ WSHL 4-32.0110110
Sep 10, 2025@ BALL 2-1 F/101.0311000
Sep 9, 2025@ BALL 3-2 F/111.0000210
Sep 7, 2025vs MILL 10-21.0000210
Sep 3, 2025vs LADW 3-01.0000010
Sep 2, 2025vs LADW 9-71.0322000
Aug 29, 2025@ BOSW 4-21.0100010
Aug 27, 2025@ STLW 2-11.0000010
Aug 26, 2025@ STLW 8-31.0000010
Aug 24, 2025vs COLW 4-01.0000010
Aug 20, 2025vs TORW 2-11.0000010
Aug 17, 2025@ CHCL 4-31.0211100
Aug 15, 2025@ CHCW 3-21.2200110
Aug 13, 2025@ MILL 12-51.0000010
Aug 10, 2025vs CINL 14-80.2000110
Aug 9, 2025vs CINL 2-11.0000020
Aug 6, 2025vs SFL 4-20.1211100
Aug 3, 2025@ COLW 9-51.0000110
Jul 30, 2025@ SFW 2-1 F/102.0200030
Jul 28, 2025@ SFW 6-51.0000020
Jul 25, 2025vs ARIL 1-0 F/111.0200010
Jul 22, 2025vs DETW 8-51.0100020
Jul 19, 2025vs CHWL 10-40.1222110
Jul 18, 2025vs CHWL 10-11.0000000
Jul 9, 2025@ KCL 4-31.0211111
Jul 8, 2025@ KCL 4-30.0100000
Jul 5, 2025@ SEAL 1-01.1000030
Jul 2, 2025vs STLW 5-01.0100110
Jul 1, 2025vs STLW 1-01.0000200
Jun 27, 2025vs NYMW 9-11.1100030
Jun 23, 2025@ MILW 5-41.2100030
Jun 20, 2025vs TEXL 6-21.1100110
Jun 19, 2025@ DETW 8-4 F/100.2222001
Jun 15, 2025@ CHCL 3-2 F/102.0000000
Jun 12, 2025@ CHCL 3-21.2000110
Jun 10, 2025vs MIAL 3-22.0000030
Jun 7, 2025vs PHIW 2-11.0000010
May 25, 2025vs MILL 6-51.1000110
May 23, 2025vs MILW 6-5 F/100.2000010
May 22, 2025vs MILL 8-51.0111021

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

Source: ESPN public MLB data, 2025 season.