Pittsburgh Pirates#72 · RP
Isaac Mattson
Age 31
Contract Value $564,851/yr
Size 6' 2" · 214
Throws RHP
Bats Right
From Erie, PA
0–0
W-L
5.35
ERA
1.60
WHIP
36
K
38.2
IP
0
GS
P-Score
P-Score not yet available
Stats updated Oct 4, 3:35 AM ET
Season overview
How good is he?
StatPlayerMLB AvgPercentile
Run Prevention4850BELOW AVG
Skill4250BELOW AVG
Workload2750POOR
Consistency5050AVERAGE
Form5050AVERAGE
Contact Management1350POOR
Game log
Pitch arsenal (2026)
Usage %Velocity
- Four-seam FB70.5%94.2 mph
- Slider12.1%84.4 mph
- Changeup10.2%86.0 mph
- Sweeper7.3%83.0 mph
Hot / cold zones (vs RHB)
.000.300.000.429.238.364.333.600.231
- Better than MLB avg
- Similar to MLB avg
- Worse than MLB avg
Splits
vs handedness
vs LHH
.916
vs RHH
.663
.253 OPS better vs RHH
Career
Frequently asked
What is Isaac Mattson's ERA in 2026?+
5.35 across 0 starts and 38.2 innings, with a 1.60 WHIP and a 3.72 FIP.
When is his next start?+
No probable start has been announced.
What pitches does he throw?+
He throws four-seam fb (70.5% at 94.2 mph mph), slider (12.1% at 84.4 mph mph), changeup (10.2% at 86.0 mph mph), sweeper (7.3% at 83.0 mph mph).
What is his P-Score?+
P-Score is not yet available for this pitcher.
How has he pitched in his last five starts?+
Fewer than three starts are available, so a last-five comparison is not shown.