2025 Stats
W-L
0-1
ERA
4.38
WHIP
1.46
K
21
SV
3
Rest-of-Season Projections
2025 Fantasy Outlook
Halvorsen, a seventh-round draft pick by the Rockies in 2023, made his major-league debut last August after compiling a 4.47 ERA and 1.47 WHIP across 44.1 innings between Colorado's Double-A and Triple-A affiliates. The 6-foot-2 right-hander featured a four-pitch mix headlined by a 100 mph fastball that he tossed 37 percent of the time, but it was his splitter (28 percent usage) and slider (16 percent) that produced the most swing-and-miss. Halvorsen pitched well enough in his limited big-league sample (13:2 K:BB over 12.1 frames) to earn save chances over the final few weeks of the season, recording two in three opportunities. The 25-year-old's minor league track record suggest ratios and walks might be an issue, but Halvorsen's raw talent stands out among other relievers in Colorado's bullpen. He's worth gambling on as a closer-in-waiting type for 2025, but his save ceiling is capped due to the team he plays for. Read Past Outlooks
Picks up third save
Halvorsen didn't allow a baserunner and earned the save with a scoreless ninth inning Tuesday against the Marlins.
ANALYSIS
Zach Agnos (personal) had recorded two consecutive saves for the Rockies but is currently on the bereavement list. That set Halvorsen up for the save chance Tuesday, and he delivered his third save of the season. After a slow start to the year, Halvorsen has turned in five scoreless efforts in his last six appearances.
Zach Agnos (personal) had recorded two consecutive saves for the Rockies but is currently on the bereavement list. That set Halvorsen up for the save chance Tuesday, and he delivered his third save of the season. After a slow start to the year, Halvorsen has turned in five scoreless efforts in his last six appearances.
Pitching Stats
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2025
2024
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
15
Last 10 Games
14
Last 5 Games
13
How many pitches does Seth Halvorsen generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Seth Halvorsen generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
-2%
BAA vs RHP
2025
-3%
BAA vs LHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .239 | 14 | 6 | 17 | 3 | |||
| Since 2023vs Right | .234 | 20 | 8 | 15 | 2 | |||
| 2025vs Left | .256 | 6 | 4 | 11 | 2 | |||
| 2025vs Right | .265 | 15 | 8 | 13 | 1 | |||
| 2024vs Left | .214 | 8 | 2 | 6 | 1 | |||
| 2024vs Right | .133 | 5 | 0 | 2 | 1 | |||
| 2023vs Left | 0 | 0 | 0 | 0 | 0 | |||
| 2023vs Right | 0 | 0 | 0 | 0 | 0 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2023
-9%
ERA at Home
2025
-23%
ERA on Road
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 3.27 | 1.05 | 22.0 | 10.6 | 2.9 | ||||
| Since 2023Away | 3.60 | 1.53 | 15.0 | 4.8 | 4.2 | ||||
| 2025Home | 4.80 | 1.33 | 15.0 | 10.8 | 4.2 | ||||
| 2025Away | 3.72 | 1.66 | 9.2 | 2.8 | 4.7 | ||||
| 2024Home | 0.00 | 0.43 | 7.0 | 10.3 | 0.0 | ||||
| 2024Away | 3.38 | 1.31 | 5.1 | 8.4 | 3.4 | ||||
| 2023Home | 0 | 0 | 0 | 0 | 0 | ||||
| 2023Away | 0 | 0 | 0 | 0 | 0 | ||||
| More Splits→ | View More Split Stats | ||||||||
Stat Review
How does Seth Halvorsen compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
1.75K/9
7.7BB/9
4.4HR/9
1.1Fastball
100.1 mphERA
4.38WHIP
1.46BABIP
.302GB/FB
2.47Left On Base
66.0%Exit Velocity
83.4 mphBarrels/BBE
4.2%Spin Rate
2047 rpmBalls Hit 95+ MPH
26.3%Swinging Strike
13.6%Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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More Fantasy News
Knocked around in defeat
Halvorsen (0-1) took the loss and was charged with a blown save Monday against the Phillies, allowing four runs on five hits while striking out one batter over two-thirds of an inning.
ANALYSIS
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Notches save Saturday
Halvorsen picked up a save against Arizona on Saturday, walking one batter in a scoreless and hitless inning of work.
ANALYSIS
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Used as setup man Wednesday
Halvorsen struck out two in a perfect eighth inning Wednesday to record his first hold of the season in a 2-1 win over Atlanta.
ANALYSIS
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Gets high-leverage work
Halvorsen allowed one hit and struck out two across 1.1 scoreless innings in the first game of Sunday's doubleheader against the Nationals.
ANALYSIS
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Bounces back to close out win
Halvorsen walked one and struck out one across a scoreless ninth inning Thursday against the Brewers.
ANALYSIS
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Latest Fantasy Rumors
Potential trade candidate
Halvorsen is one of the players the Rockies might trade before the deadline, according to Mark Feinsand of MLB.com.
ANALYSIS
Halvorsen's numbers this season aren't eye-popping by any means, as he owns a 4.56 ERA and a 1.52 WHIP across 23.2 innings and 24 appearances in 2025. However, it wouldn't be odd if some contenders show interest in the former Missouri standout. He owns a triple-digit fastball, and his 58.2 percent groundball rate is among the highest in all of baseball.
Halvorsen's numbers this season aren't eye-popping by any means, as he owns a 4.56 ERA and a 1.52 WHIP across 23.2 innings and 24 appearances in 2025. However, it wouldn't be odd if some contenders show interest in the former Missouri standout. He owns a triple-digit fastball, and his 58.2 percent groundball rate is among the highest in all of baseball.