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Relief Pitcher · Colorado Rockies

Seth Halvorsen

RHP · Throws Right · Age 26Reliever
ERA
4.74
FIP
–
IP
19.0
W-L
0-1
WHIP
1.95
K%
17.7
BB%
15.6
GB%
–
K/9
8.1
HR/9
1.4
Drafted by the Colorado Rockies in 2023 (round 7). He made his MLB debut on August 30, 2024.Facts: MLB StatsAPI (people · transactions)
No scheduled start today. The model projection and lineup matchup appear on start days.

Four-Seam Fastball

FF · lead pitch

57% of pitches · .378 xwOBA allowed · 166 BIP · where it goes, what it costs

Pitcher Locations
where he throws it · catcher’s view
3%5%5%2%2%4%8%9%5%2%4%7%14%10%6%0%1%2%3%1%0%2%2%3%2%
Rare 0% · Common 10% · Very common 20%+
xwOBA Allowed
damage done by zone · all batters
.696.487.187.703–.425.335.580.200–.603.322.335.331.561.000.127.348.699––.000.020.701–
Cold .200 · Avg .310 · Hot .500+
Expected Damage
locations × damage zones
.019.022.010.014–.015.026.050.010–.027.023.046.034.032.000.001.008.022––.000.000.018–
Low risk · Average · High-risk zone
Four-Seam Fastball (57% usage) has allowed .378 xwOBA over 166 balls in play — his most-used pitch.

Arsenal

usage × whiff, ranked

4 pitch types · 1,258-pitch sample · 2026/2025/2024 blend, weighted 4/3/1

Four-Seam Fastball FF
57% usage · 17% whiff · .378 xwOBA · 98.8 mph
Slider SL
24% usage · 38% whiff · .279 xwOBA · 86.4 mph
Splitter FS
18% usage · 28% whiff · .347 xwOBA · 89.7 mph
Unknown UN
1% usage
Whiff% Trend
last 8 outings · by pitch · min 5 swings per point
0102030405060706/56/96/126/136/156/266/286/30
Four-Seam FastballSliderSplitter
Hand Splits
K% + xwOBA allowed by batter side · 2026/2025/2024 blend, weighted 4/3/1
SplitK%xwOBASample
vs. LHB15.3 .368 156
vs. RHB22.8 .333 154
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Market lines

current pick’em lines by book · updates through the day

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DFS picks

today’s picks for this pitcher, probability-sorted · graded nightly

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