2025 Stats
W-L
0-0
ERA
4.26
WHIP
1.42
K
11
SV
1
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
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
The 25-year-old righty hasn't notched a save since March 29, blowing his only other chance April 22, and the Rockies elected to use Halvorsen in a setup role Wednesday while letting Zach Agnos handle the ninth and pick up his first career save. Halvorsen did face Atlanta's 9-1-2 hitters, striking out Eddie Rosario and Austin Riley, so it was still a very high-leverage spot. Tyler Kinley, who hasn't pitched since Saturday, also figures to be in the closer mix for Colorado, but the team's 5-25 record hasn't provided many opportunities for manager Bud Black to reveal his tendencies with his current bullpen. On the season, Halvorsen has a 4.26 ERA, 1.42 WHIP and 11:6 K:BB through 12.2 innings.
The 25-year-old righty hasn't notched a save since March 29, blowing his only other chance April 22, and the Rockies elected to use Halvorsen in a setup role Wednesday while letting Zach Agnos handle the ninth and pick up his first career save. Halvorsen did face Atlanta's 9-1-2 hitters, striking out Eddie Rosario and Austin Riley, so it was still a very high-leverage spot. Tyler Kinley, who hasn't pitched since Saturday, also figures to be in the closer mix for Colorado, but the team's 5-25 record hasn't provided many opportunities for manager Bud Black to reveal his tendencies with his current bullpen. On the season, Halvorsen has a 4.26 ERA, 1.42 WHIP and 11:6 K:BB through 12.2 innings.
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
15
Last 5 Games
10
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
-7%
BAA vs RHP
2025
-2%
BAA vs RHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .234 | 10 | 3 | 11 | 2 | |||
| Since 2023vs Right | .217 | 14 | 5 | 10 | 1 | |||
| 2025vs Left | .263 | 2 | 1 | 5 | 1 | |||
| 2025vs Right | .258 | 9 | 5 | 8 | 0 | |||
| 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
-38%
ERA at Home
2025
Even Split
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 2.30 | 0.83 | 15.2 | 9.8 | 2.3 | ||||
| Since 2023Away | 3.72 | 1.66 | 9.2 | 6.5 | 3.7 | ||||
| 2025Home | 4.15 | 1.15 | 8.2 | 9.3 | 4.2 | ||||
| 2025Away | 4.15 | 2.08 | 4.1 | 4.2 | 4.2 | ||||
| 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
1.83K/9
7.8BB/9
4.3HR/9
0.7Fastball
99.8 mphERA
4.26WHIP
1.42BABIP
.308GB/FB
2.67Left On Base
54.2%Exit Velocity
83.5 mphBarrels/BBE
3.4%Spin Rate
2037 rpmBalls Hit 95+ MPH
22.0%Swinging Strike
14.7%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
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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Crushed in blowout loss
Halvorsen allowed six runs (three earned) on two hits and three walks while striking out one over one-third of an inning in Wednesday's loss to the Brewers.
ANALYSIS
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Earns first save
Halvorsen was perfect Saturday, striking out one without allowing a baserunner to secure a four-out save against the Rays.
ANALYSIS
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Implodes against Reds
Halvorsen allowed five earned runs on three hits and two walks while striking out one across two-thirds of an inning in Monday's Cactus League game against the Reds.
ANALYSIS
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