2025 Stats
W-L
0-0
ERA
5.19
WHIP
1.85
K
8
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
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
The appearance was only Halvorsen's second since April 10, as the Rockies were in the midst of an eight-game losing streak. He was called upon to keep Colorado down one run with runners at first and second in the eighth inning Sunday, and he then remained in the game to conclude the contest. Tyler Kinley tallied the save in Game 2 of the doubleheader with Halvorsen unavailable, but Halvorsen still appears to be the team's primary closer.
The appearance was only Halvorsen's second since April 10, as the Rockies were in the midst of an eight-game losing streak. He was called upon to keep Colorado down one run with runners at first and second in the eighth inning Sunday, and he then remained in the game to conclude the contest. Tyler Kinley tallied the save in Game 2 of the doubleheader with Halvorsen unavailable, but Halvorsen still appears to be the team's primary closer.
Pitching Stats
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2025
2024
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
18
Last 10 Games
18
Last 5 Games
20
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
-4%
BAA vs RHP
2025
-5%
BAA vs LHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .238 | 9 | 3 | 10 | 2 | |||
| Since 2023vs Right | .229 | 12 | 5 | 8 | 1 | |||
| 2025vs Left | .286 | 1 | 1 | 4 | 1 | |||
| 2025vs Right | .300 | 7 | 5 | 6 | 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
-40%
ERA at Home
2025
-22%
ERA on Road
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 2.31 | 0.94 | 11.2 | 10.8 | 3.1 | ||||
| Since 2023Away | 3.86 | 1.61 | 9.1 | 6.8 | 3.9 | ||||
| 2025Home | 5.79 | 1.71 | 4.2 | 11.6 | 7.7 | ||||
| 2025Away | 4.50 | 2.00 | 4.0 | 4.5 | 4.5 | ||||
| 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
1.33K/9
8.3BB/9
6.2HR/9
1.0Fastball
99.6 mphERA
5.19WHIP
1.85BABIP
.354GB/FB
2.13Left On Base
54.8%Exit Velocity
83.1 mphBarrels/BBE
2.9%Spin Rate
2022 rpmBalls Hit 95+ MPH
25.7%Swinging Strike
16.0%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
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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In mix for saves
Halvorsen is among the candidates to open the season as the Rockies' closer, Patrick Saunders of the Denver Post reports.
ANALYSIS
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