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Seth Halvorsen

Rockies Career team 2024–2026
Number #54
Position RP
Bats R
Throws R
Age 26
Height 6' 2"
Weight 243 lbs
Birth Place Chicago, IL
Born Feb 18, 2000

Key Insights

2026
His fastball is the pitch everything else is built on

Halvorsen's 4-seam fastball averages 98.7 mph, and has touched 100.7.

57 thrown, 61.3% of his pitches.
One pitch of his moves in a way hitters rarely see

Halvorsen's 4-seam fastball carries 14.3 inches of ride against a spinless ball, the biggest vertical move in his arsenal.

57 thrown, averaging 98.7 mph.
One pitch of his runs sideways more than almost anyone's

Halvorsen's 4-seam fastball moves 9.4 inches toward the third-base side, the biggest horizontal move in his arsenal.

57 thrown, averaging 98.7 mph.
One pitch of his spins more than almost anyone's

Halvorsen's 4-seam fastball spins at 2,297 rpm, the highest in his arsenal.

57 thrown in 2026.

Movement Profile (Induced Break)

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

Player Bio Data
DOB Feb 18, 2000
Birth Place Chicago, IL
Height 6' 2"
Weight 243 lbs LBS
Bats/Throws R/R