Sean Sullivan
Age 24
Contract Value $140,494/yr
Size 6' 4" · 200
Throws LHP
Bats Right
From Boston, MA
0–3
W-L
8.87
ERA
2.01
WHIP
16
K
22.1
IP
5
GS
Stats updated Sep 13, 9:35 AM ETLast game Jul 4 vs SF
Season overview
How good is he?
StatPlayerMLB AvgPercentile
Run Prevention1650POOR
Skill1450POOR
Workload2450POOR
Consistency1050POOR
Form2050POOR
Contact Management5150AVERAGE
Recent form
Last 5 startsGame log
Pitch arsenal (2026)
Usage %Velocity
- Four-seam FB45.9%87.6 mph
- Sweeper17.5%75.4 mph
- Changeup15.8%77.1 mph
- Cutter15.0%82.7 mph
- Sinker5.8%86.6 mph
Hot / cold zones (vs RHB)
.500.273.667.471.333.364.429.143.333
- Better than MLB avg
- Similar to MLB avg
- Worse than MLB avg
Monthly ERA (2026)
Minimum 1 GSSplits
Home / away
Home (3 GS)
8.22
WHIP 2.09
Away (2 GS)
10.29
WHIP 1.86
2.07 ERA better at home
vs handedness
vs LHH
1.190
vs RHH
1.052
.138 OPS better vs RHH
By monthERA · IP · K
July9.535.24
June8.6416.212
Career
Frequently asked
What is Sean Sullivan's ERA in 2026?+
8.87 across 5 starts and 22.1 innings, with a 2.01 WHIP and a 6.46 FIP. That ERA ranks 217th among qualified starters.
When is his next start?+
No probable start has been announced.
What pitches does he throw?+
He throws four-seam fb (45.9% at 87.6 mph mph), sweeper (17.5% at 75.4 mph mph), changeup (15.8% at 77.1 mph mph), cutter (15.0% at 82.7 mph mph), sinker (5.8% at 86.6 mph mph).
What is his P-Score?+
20 out of 100, which we label poor — 217th among 217 qualified starters.
How has he pitched in his last 5 starts?+
A 8.87 ERA, 6.4 K/9, 4.4 BB/9.