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Sean Sullivan

Rockies
Number #45
Position SP
Bats R
Throws L
Age 24
Height 6' 4"
Weight 200 lbs
Birth Place Boston, MA
Born Jul 22, 2002

Key Insights

2026
His fastball is the pitch everything else is built on

Sullivan's 4-seam fastball averages 87.5 mph, and has touched 91.2.

209 thrown, 50.7% of his pitches.
The angle he throws from is unusual, and hitters notice

Sullivan releases the ball from a sidearm slot, about 19 degrees above horizontal and 3.1 feet to the first-base side of the rubber.

412 tracked release points, averaging 5.5 feet off the ground.
When he falls behind, hitters know exactly what is coming

Behind in the count Sullivan throws a fastball 87.5% of the time, against 50.8% when he is ahead.

112 pitches behind in the count, 120 ahead.
There is one pitch of his that keeps getting hit

Contact off Sullivan's cutter leaves the bat at 91.7 mph, against 81.3 off his sweeper.

63 and 72 of them thrown.
His velocity drains away as the outing goes on

Sullivan's fastball averages 87.2 mph in his first 25 pitches of a start and 85.1 past his 75th.

91 early fastballs, 44 late ones.
One pitch of his moves in a way hitters rarely see

Sullivan's 4-seam fastball carries 12.7 inches of ride against a spinless ball, the biggest vertical move in his arsenal.

209 thrown, averaging 87.5 mph.

Movement Profile (Induced Break)

Catcher's Perspective • Pitch movement relative to a spinless ball

Player Bio Data
DOB Jul 22, 2002
Birth Place Boston, MA
Height 6' 4"
Weight 200 lbs LBS
Bats/Throws R/L