2025 Stats
W-L
1-2
ERA
4.99
WHIP
1.54
K
36
SV
11
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
Signed a one-year contract with the Rockies in August of 2024.
Labors for 11th save
Halvorsen earned the save in Monday's 8-6 win over the Guardians, allowing one run on one hit and two walks with one strikeout in the ninth inning.
Analysis
Halvorsen was called upon to protect a three-run lead after the Rockies rallied in the top of the ninth, and he managed to hang on despite throwing just 13 of 27 pitches for strikes. Over his past 10 appearances, the 25-year-old has converted all six of his save chances despite allowing seven earned runs. For the season, he's up to 11 saves with a 4.99 ERA, 1.54 WHIP and 36:20 K:BB across 39.2 innings.
Halvorsen was called upon to protect a three-run lead after the Rockies rallied in the top of the ninth, and he managed to hang on despite throwing just 13 of 27 pitches for strikes. Over his past 10 appearances, the 25-year-old has converted all six of his save chances despite allowing seven earned runs. For the season, he's up to 11 saves with a 4.99 ERA, 1.54 WHIP and 36:20 K:BB across 39.2 innings.
Pitching Stats
Loading Pitching Stats...
2025 MLB Game Log
2025
2024
Minor League Game Log
Calculate Stats Over Time
Just click on any two dates.
Loading Minor League Pitching Game Log...
Pitching Appearances Breakdown
Average Pitch Count
15
Last 10 Games
18
Last 5 Games
18
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
-3%
BAA vs LHP
2025
-7%
BAA vs LHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .250 | 20 | 12 | 26 | 6 | |||
| Since 2023vs Right | .258 | 29 | 10 | 23 | 3 | |||
| 2025vs Left | .263 | 12 | 10 | 20 | 5 | |||
| 2025vs Right | .284 | 24 | 10 | 21 | 2 | |||
| 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
-44%
ERA at Home
2025
-37%
ERA at Home
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 3.16 | 1.12 | 31.1 | 10.6 | 2.9 | ||||
| Since 2023Away | 5.66 | 1.74 | 20.2 | 5.2 | 5.2 | ||||
| 2025Home | 4.07 | 1.32 | 24.1 | 10.7 | 3.7 | ||||
| 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 | ||||
| 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
1.80K/9
8.2BB/9
4.5HR/9
1.6Fastball
100.1 mphERA
4.99WHIP
1.54BABIP
.309GB/FB
2.07Left On Base
68.4%Exit Velocity
83.4 mphBarrels/BBE
5.0%Spin Rate
2129 rpmBalls Hit 95+ MPH
25.1%Swinging Strike
13.4%Prospect Rankings History
Advanced Pitching Stats
Loading Advanced Pitching Stats...
Defensive Stats
Loading MLB Defensive Stats...
Stats Vs Today's Lineup
Want more matchup stats?
Loading Matchup Stats...
Our full team depth charts are reserved for RotoWire subscribers.
Subscribe Now
More Fantasy News
Secures 10th save
Halvorsen threw a perfect ninth inning to earn the save in Friday's 6-5 win over the Orioles. He did not record a strikeout.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Tallies ninth save Friday
Halvorsen picked up the save in Friday's 6-4 win over the Twins, allowing one hit and no walks during a scoreless ninth inning. He struck out two.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Earns eighth save
Halvorsen walked a batter during a scoreless inning and earned a save against the White Sox on Sunday.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Records four-out save
Halvorsen earned the save in Thursday's 7-6 win over the Astros, allowing one run on three hits while striking out one batter in 1.1 innings. He did not issue a walk.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Scoreless ninth inning
Halvorsen allowed two hits and one walk while striking out one across a scoreless ninth inning Sunday against the Brewers.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
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.