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Greg Weissert

Red Sox
Number #57
Position RP
Bats R
Throws R
Age 31
Height 6' 2"
Weight 235 lbs
Birth Place Bay Shore, NY
Born Feb 4, 1995

Key Insights

2026
The angle he throws from is unusual, and hitters notice

Weissert releases the ball from a sidearm slot, about 11 degrees above horizontal and 2.5 feet to the third-base side of the rubber.

991 tracked release points, averaging 4.8 feet off the ground.
One type of hitter does all the damage against him

Hitters do their damage on his breaking balls: a .480 expected average against them, against .313 on his fastballs.

85 of his breaking balls thrown.
One pitch of his runs sideways more than almost anyone's

Weissert's sweeper moves 18.3 inches toward the first-base side, the biggest horizontal move in his arsenal.

125 thrown, averaging 82.0 mph.
There is one pitch of his that keeps getting hit

Contact off Weissert's slider leaves the bat at 91.8 mph, against 81.4 off his sweeper.

81 and 125 of them thrown.
When he falls behind, hitters know exactly what is coming

Behind in the count Weissert throws a fastball 76.8% of the time, against 57.4% when he is ahead.

211 pitches behind in the count, 345 ahead.
One pitch of his spins more than almost anyone's

Weissert's sweeper spins at 2,884 rpm, the highest in his arsenal.

125 thrown in 2026.

Movement Profile (Induced Break)

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

Player Bio Data
DOB Feb 4, 1995
Birth Place Bay Shore, NY
Height 6' 2"
Weight 235 lbs LBS
Bats/Throws R/R