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Jack Ralston

Marlins
Number #79
Position RP
Bats R
Throws R
Age 29
Height 6' 6"
Weight 231 lbs
Birth Place Panorama City, CA
Born Aug 13, 1997

Key Insights

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

Ralston releases the ball from over the top, about 83 degrees above horizontal and 0.3 feet to the third-base side of the rubber.

309 tracked release points, averaging 6.9 feet off the ground.
One pitch of his moves in a way hitters rarely see

Ralston's 4-seam fastball carries 18.0 inches of ride against a spinless ball, the biggest vertical move in his arsenal.

82 thrown, averaging 93.6 mph.
There is one pitch of his that keeps getting hit

Contact off Ralston's 4-seam fastball leaves the bat at 92.8 mph, against 82.7 off his splitter.

82 and 157 of them thrown.
He falls behind hitters far too often

Ralston throws a strike on the first pitch 52.6% of the time.

76 plate appearances started in 2026.
He releases the ball about where everyone else does

Ralston releases the ball 5.7 feet down the mound, a shorter stride than most.

309 tracked pitches in 2026.
His pitches move in ways that fit together

Ralston works with 3 pitches: Splitter, 4-Seam Fastball and Slider. The splitter is 50.8% of everything he throws.

309 classified pitches in 2026.

Movement Profile (Induced Break)

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

Player Bio Data
DOB Aug 13, 1997
Birth Place Panorama City, CA
Height 6' 6"
Weight 231 lbs LBS
Bats/Throws R/R