Pittsburgh Pirates· #72· Pitcher
Isaac Mattson
Bats R · Throws R·Age 31 (Jul 14, 1995)·6' 2", 214 lb·Erie, PA, USA
2026 Pitching
ERA
4.91
WHIP
1.58
IP
36.2
K%
20.5
BB%
10.8
K/9
8.35
W-L
0-0
GS
0
SV
0
HLD
8
DiamondIQ WAR
36.7 IP · 2026
0.4
4.2 runs above replacement
FIP · 3.84 (park 1.04)0.0
vs replacement · RP, 36.7 IP+4.2
FIP-based runs above replacement, park-adjusted, scaled by innings over runs-per-win. Reliever leverage is simplified (v1). Full methodology.
Pitch Arsenal · Statcast
Four-Seam72% · 94.1 · 20% whiff
Slider12% · 84.2 · 27% whiff
Changeup10% · 86.0 · 21% whiff
Sweeper7% · 82.9 · 31% whiff
Career Pitching
| Yr | Tm | W | L | ERA | G | GS | SV | IP | SO | BB | WHIP | K/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | Pittsburgh Pirates | 0 | 0 | 4.91 | 37 | 0 | 0 | 36.2 | 34 | 18 | 1.58 | 8.35 |
| 2025 | Pittsburgh Pirates | 3 | 3 | 2.45 | 44 | 0 | 0 | 47.2 | 45 | 19 | 1.13 | 8.50 |
| 2024 | Pittsburgh Pirates | 0 | 0 | 5.06 | 3 | 0 | 0 | 5.1 | 6 | 5 | 1.13 | 10.13 |
| 2021 | Baltimore Orioles | 0 | 0 | 6.23 | 4 | 0 | 0 | 4.1 | 3 | 5 | 2.31 | 6.23 |
Recent Games
Aug 17 vs Detroit TigersL
2.0 IP, 1 ER, 1 K, 2 BB
Jul 28 vs Arizona DiamondbacksL
1.2 IP, 1 ER, 3 K, 1 BB
Jul 25 vs Chicago CubsL
0.1 IP, 3 ER, 1 K, 1 BB
Jul 19 @ Cleveland GuardiansW
1.0 IP, 0 ER, 1 K, 0 BB
Jul 18 @ Cleveland GuardiansW
1.0 IP, 0 ER, 2 K, 0 BB
Jul 12 vs Milwaukee BrewersW
0.2 IP, 0 ER, 1 K, 1 BB
Jul 11 vs Milwaukee BrewersW
1.0 IP, 0 ER, 0 K, 0 BB
Jul 8 vs Atlanta BravesL
1.0 IP, 1 ER, 1 K, 0 BB
Jul 5 @ Washington NationalsW
1.0 IP, 0 ER, 1 K, 0 BB
Jul 3 @ Washington NationalsL
1.1 IP, 4 ER, 1 K, 1 BB