Isaac Mattson 2026 season stats

Isaac Mattson played 38 games for the Pittsburgh Pirates in the 2026 MLB regular season, with 0 wins, a 5.35 ERA and 36 strikeouts.

All Isaac Mattson seasonsPittsburgh Pirates

2026 regular season

GP
38
R
23
H
44
K
36
L
0
W
0
BB
18
ER
23
GS
0
IP
38.2
SV
0
W%
0.0

2026 splits

Totals, from the 38 regular-season games in the log.

Isaac Mattson, 2026 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 games3838.2442323183635.35
Home2224.0271414122205.25
Away1614.2179961435.52
Wins1615.0111141410.60
Losses2223.2332222142228.37
March32.23223406.75
April1414.012556803.21
May43.04221306.00
June66.02112711.50
July99.0179941129.00
August12.02112104.50
September12.043302013.50

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

By opponent

Isaac Mattson, 2026, 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 ARI22.03111404.50
vs ATH11.01110219.00
vs ATL11.02110109.00
vs BAL11.01001100.00
vs CHC32.163322011.57
vs CIN44.11001400.00
vs CLE22.01000300.00
vs DET12.02112104.50
vs LAA12.043302013.50
vs MIA11.10002100.00
vs MIL43.22002200.00
vs NYM21.232223010.80
vs PHI33.02001200.00
vs SD21.23000200.00
vs SEA11.00000100.00
vs SF10.132200054.00
vs STL21.035521045.00
vs TB22.00000100.00
vs WSH45.17442326.75

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

2026 games

Isaac Mattson, last 15 games, 2026 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 5, 2026vs LAAL 6-12.0433020
Aug 17, 2026vs DETL 8-52.0211210
Jul 28, 2026vs ARIL 8-7 F/121.2311130
Jul 25, 2026vs CHCL 11-00.1433110
Jul 19, 2026@ CLEW 7-11.0000010
Jul 18, 2026@ CLEW 7-11.0100020
Jul 12, 2026vs MILW 14-50.2100110
Jul 11, 2026vs MILW 3-21.0100000
Jul 8, 2026vs ATLL 3-01.0211010
Jul 5, 2026@ WSHW 11-51.0200010
Jul 3, 2026@ WSHL 9-51.1344112
Jun 30, 2026@ PHIL 8-00.2100000
Jun 27, 2026vs CINL 9-71.0000020
Jun 26, 2026vs CINL 6-41.0000010
Jun 23, 2026vs SEAL 3-21.0000010

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

All 38 gamesOnly the last 15 games
Isaac Mattson, game by game, 2026 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 5, 2026vs LAAL 6-12.0433020
Aug 17, 2026vs DETL 8-52.0211210
Jul 28, 2026vs ARIL 8-7 F/121.2311130
Jul 25, 2026vs CHCL 11-00.1433110
Jul 19, 2026@ CLEW 7-11.0000010
Jul 18, 2026@ CLEW 7-11.0100020
Jul 12, 2026vs MILW 14-50.2100110
Jul 11, 2026vs MILW 3-21.0100000
Jul 8, 2026vs ATLL 3-01.0211010
Jul 5, 2026@ WSHW 11-51.0200010
Jul 3, 2026@ WSHL 9-51.1344112
Jun 30, 2026@ PHIL 8-00.2100000
Jun 27, 2026vs CINL 9-71.0000020
Jun 26, 2026vs CINL 6-41.0000010
Jun 23, 2026vs SEAL 3-21.0000010
Jun 17, 2026@ ATHW 12-41.0111021
Jun 14, 2026vs MIAL 4-21.1000210
May 17, 2026vs PHIL 6-01.0100000
May 16, 2026vs PHIL 6-01.1000120
May 10, 2026@ SFL 7-6 F/120.1322000
May 7, 2026@ ARIW 4-20.1000010
Apr 30, 2026vs STLL 10-50.2355200
Apr 27, 2026vs STLL 4-20.1000010
Apr 25, 2026@ MILW 6-3 F/101.0000000
Apr 24, 2026@ MILW 6-01.0000110
Apr 19, 2026vs TBW 6-31.0000010
Apr 18, 2026vs TBL 8-7 F/131.0000000
Apr 16, 2026vs WSHL 8-7 F/101.0000100
Apr 14, 2026vs WSHL 5-42.0200010
Apr 11, 2026@ CHCW 4-3 F/111.0200010
Apr 10, 2026@ CHCW 2-01.0000100
Apr 7, 2026vs SDW 7-10.2100000
Apr 6, 2026vs SDL 5-01.0200020
Apr 4, 2026vs BALW 3-21.0100110
Apr 1, 2026@ CINW 8-31.1100000
Mar 30, 2026@ CINL 2-01.0000110
Mar 29, 2026@ NYMW 4-3 F/101.0000020
Mar 26, 2026@ NYML 11-70.2322210

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

Source: ESPN public MLB data, 2026 season.