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Jack Sinclair

Nationals
Number #49
Position RP
Bats R
Throws R
Age 27
Height 6' 4"
Weight 170 lbs
Birth Place Coral Springs, FL
Born May 3, 1999

Key Insights

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

Sinclair releases the ball from a sidearm slot, about 17 degrees above horizontal and 2.4 feet to the third-base side of the rubber.

167 tracked release points, averaging 5.2 feet off the ground.
His fastball is the pitch everything else is built on

Sinclair's 4-seam fastball averages 96.9 mph, and has touched 99.1.

53 thrown, 31.7% of his pitches.
This is the pitch he goes to when he needs the out

With two strikes Sinclair goes to the 4-seam fastball: 43.9% of his two-strike pitches, against 27.8% the rest of the time.

41 two-strike pitches in 2026.
One pitch of his runs sideways more than almost anyone's

Sinclair's 4-seam fastball moves 15.6 inches toward the third-base side, the biggest horizontal move in his arsenal.

53 thrown, averaging 96.9 mph.
He saves one pitch for one side of the plate

Sinclair throws the sweeper 56.4% of the time against right-handers and 24.7% against left-handers.

94 pitches to right-handers, 73 to left-handers.
He works one part of the zone far more than the rest

Sinclair lives at the bottom of the zone: his average pitch crosses at 2.22 feet, against a zone that runs 1.5 to 3.5.

167 located pitches in 2026.

Movement Profile (Induced Break)

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

Player Bio Data
DOB May 3, 1999
Birth Place Coral Springs, FL
Height 6' 4"
Weight 170 lbs LBS
Bats/Throws R/R