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Seth Halvorsen

Rockies Career team 2024 to 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 98.8 mph, and has touched 101.9.

235 thrown, 62.7% of his pitches.
This is the pitch he goes to when he needs the out

With two strikes Halvorsen goes to the slider: 39.4% of his two-strike pitches, against 25.5% the rest of the time.

104 two-strike pitches in 2026.
One pitch of his moves in a way hitters rarely see

Halvorsen's 4-seam fastball carries 13.8 inches of ride against a spinless ball, the biggest vertical move in his arsenal.

235 thrown, averaging 98.8 mph.
His pitches move in ways that fit together

Halvorsen works with 3 pitches: 4-Seam Fastball, Slider and Splitter. The 4-seam fastball is 62.7% of everything he throws.

375 classified pitches in 2026.
When he falls behind, hitters know exactly what is coming

Behind in the count Halvorsen throws a fastball 74.1% of the time, against 57.1% when he is ahead.

108 pitches behind in the count, 98 ahead.
He lives on one side of the plate

Halvorsen works in on right-handers: his average pitch lands 2.6 inches to that side of the middle of the plate.

375 located pitches 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