2026 Stats
W-L
0-0
ERA
3.31
WHIP
1.78
K
16
SV
0
Rest-of-Season Projections
2026 Fantasy Outlook
Halvorsen's ratios were lackluster, but when he was healthy, the right-hander proved to be the most reliable option within a pen that ranked 29th in bullpen ERA (5.18). He led Colorado with 11 saves (38 percent team save share), but might have approached 20 if not for a season-ending elbow injury last August. Among relief pitchers who pitched a minimum of 30 innings in 2025, Halvorsen ranked third in average fastball velocity (100.0 mph) behind Mason Miller (101.2 mph) and Jhoan Duran (100.5 mph). Despite regularly hitting triple-digits on the radar gun, Halvorsen's 20.9 percent strikeout rate was below average, but his solid swinging strike percentage (13.3) suggests there is room for him to rebound in the K-department. Looking towards 2026, Halvorsen and Victor Vodnik figure to remain atop Colorado's hiearchy for saves. First, Halvorsen will need to prove he is past the elbow injury that cut his 2025 campaign short. Read Past Outlooks
Signed a one-year contract with the Rockies in March of 2026.
Demoted to Triple-A
The Rockies optioned Halvorsen to Triple-A Albuquerque on Wednesday.
Analysis
Halvorsen has turned in a 3.31 ERA through 16.1 innings with the Rockies this season, but he'll end up as the odd man out of Colorado's bullpen following Jimmy Herget's (shoulder) return from the injured list. Based on the results Halvorsen has gotten in both the majors and at Triple-A (2.45 ERA in 14.2 IP), he's a safe bet to rejoin the Rockies at some point when the team needs a fresh arm.
Halvorsen has turned in a 3.31 ERA through 16.1 innings with the Rockies this season, but he'll end up as the odd man out of Colorado's bullpen following Jimmy Herget's (shoulder) return from the injured list. Based on the results Halvorsen has gotten in both the majors and at Triple-A (2.45 ERA in 14.2 IP), he's a safe bet to rejoin the Rockies at some point when the team needs a fresh arm.
Pitching Stats
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2026 MLB Game Log
2026
2025
2024
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
18
Last 10 Games
17
Last 5 Games
17
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 2024
-20%
BAA vs RHP
2026
-63%
BAA vs RHP
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2024vs Left | .276 | 26 | 21 | 35 | 7 |
| Since 2024vs Right | .221 | 39 | 16 | 29 | 4 |
| 2026vs Left | .391 | 6 | 8 | 9 | 1 |
| 2026vs Right | .143 | 10 | 6 | 6 | 1 |
| 2025vs Left | .263 | 12 | 11 | 20 | 5 |
| 2025vs Right | .284 | 24 | 10 | 21 | 2 |
| 2024vs Left | .214 | 8 | 2 | 6 | 1 |
| 2024vs Right | .133 | 5 | 0 | 2 | 1 |
Home/Away Pitching Splits
Since 2024
-49%
ERA at Home
2026
-75%
ERA at Home
| ERA | WHIP | IP | K/9 | BB/9 | |
|---|---|---|---|---|---|
| Since 2024Home | 2.79 | 1.22 | 38.2 | 10.5 | 4.0 |
| Since 2024Away | 5.46 | 1.82 | 29.2 | 6.1 | 6.1 |
| 2026Home | 1.23 | 1.50 | 7.1 | 9.8 | 7.4 |
| 2026Away | 5.00 | 2.00 | 9.0 | 8.0 | 8.0 |
| 2025Home | 4.07 | 1.36 | 24.1 | 10.7 | 4.1 |
| 2025Away | 6.46 | 1.89 | 15.1 | 4.1 | 5.9 |
| 2024Home | 0.00 | 0.43 | 7.0 | 10.3 | 0.0 |
| 2024Away | 3.38 | 1.31 | 5.1 | 8.4 | 3.4 |
Minor League Left/Right Pitching Splits (AAA)
Since 2024
-10%
BAA vs LHP
2026
-14%
BAA vs LHP
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2024vs Left | .205 | 14 | 4 | 8 | 1 |
| Since 2024vs Right | .229 | 21 | 7 | 11 | 1 |
| 2026vs Left | .192 | 10 | 2 | 5 | 1 |
| 2026vs Right | .222 | 10 | 5 | 6 | 0 |
| 2025vs Left | 0 | 0 | 0 | 0 | 0 |
| 2025vs Right | 0 | 0 | 0 | 0 | 0 |
| 2024vs Left | .231 | 4 | 2 | 3 | 0 |
| 2024vs Right | .238 | 11 | 2 | 5 | 1 |
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
1.14K/9
8.8BB/9
7.7HR/9
1.1Fastball
98.9 mphERA
3.31WHIP
1.78BABIP
.302GB/FB
1.58Left On Base
87.8%Exit Velocity
85.3 mphBarrels/BBE
2.9%Spin Rate
2285 rpmBalls Hit 95+ MPH
23.8%Swinging Strike
10.9%Prospect Rankings History
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Defensive Stats
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Stats Vs Today's Lineup
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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.
More Fantasy News
Charged with blown save
Halvorsen blew the save in Monday's 5-4 loss to the Cubs. He allowed two inherited runners to score on a hit and a walk without recording an out.
Analysis
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Back with big-league club
The Rockies recalled Halvorsen from Triple-A Albuquerque on Saturday.
Analysis
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Jettisoned to minors
The Rockies optioned Halvorsen to Triple-A Albuquerque on Monday.
Analysis
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Back in big-league bullpen
The Rockies recalled Halvorsen from Triple-A Albuquerque on Thursday.
Analysis
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Optioned to Triple-A
The Rockies optioned Halvorsen to Triple-A Albuquerque on Tuesday, Kevin Henry of The Denver Gazette reports.
Analysis
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Latest Fantasy Rumors
Target for Mets?
Halvorsen is listed as a potential trade target for the Mets, according to Jim Bowden of The Athletic.
Analysis
The Mets need to find a way to bolster their bullpen before the July 31 trade deadline since they're likely to be in a tight race with Philadelphia and Atlanta for a playoff berth. On that note, Halvorsen is a player who could boost the team's bullpen dramatically. The right-hander owns a 4.31 ERA across 32 appearances this season.
The Mets need to find a way to bolster their bullpen before the July 31 trade deadline since they're likely to be in a tight race with Philadelphia and Atlanta for a playoff berth. On that note, Halvorsen is a player who could boost the team's bullpen dramatically. The right-hander owns a 4.31 ERA across 32 appearances this season.