Seth Halvorsen

24-Year-Old PitcherRP
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
RANKS
From Preseason
$Signed a one-year contract with the Rockies in August of 2024.
Nabs another save
PColorado Rockies
September 26, 2024
Halvorsen picked up the save Thursday against the Cardinals, allowing one hit and no walks with one strikeout across a scoreless ninth inning.
ANALYSIS
Halvorsen picked up his second save of the campaign and appears to have a lock on the Rockies' closing job in the wake of Tyler Kinley's elbow injury. Halvorsen has been excellent since being called up Aug. 30, logging a 1.69 ERA with a 10:2 K:BB across 10.2 innings.
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Pitching Stats
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2024
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Pitching Appearances Breakdown
Average Pitch Count
15
Last 10 Games
16
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+
 
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+
 
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
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
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 2022
 
 
-38%
BAA vs RHP
2024
 
 
-38%
BAA vs RHP
2023
No Stats
2022
No Stats
BAA Batters K BB H 2B 3B HR
Since 2022vs Left .214 30 8 2 6 0 0 1
Since 2022vs Right .133 16 5 0 2 0 0 1
2024vs Left .214 30 8 2 6 0 0 1
2024vs Right .133 16 5 0 2 0 0 1
2023vs Left 0 0 0 0 0 0 0 0
2023vs Right 0 0 0 0 0 0 0 0
2022vs Left 0 0 0 0 0 0 0 0
2022vs Right 0 0 0 0 0 0 0 0
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2022
 
 
-100%
ERA at Home
2024
 
 
-100%
ERA at Home
2023
No Stats
2022
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2022Home 0.00 0.43 7.0 1 0 1 10.3 0.0 0.0
Since 2022Away 3.38 1.31 5.1 1 1 1 8.4 3.4 3.4
2024Home 0.00 0.43 7.0 1 0 1 10.3 0.0 0.0
2024Away 3.38 1.31 5.1 1 1 1 8.4 3.4 3.4
2023Home 0 0 0 0 0 0 0 0 0
2023Away 0 0 0 0 0 0 0 0 0
2022Home 0 0 0 0 0 0 0 0 0
2022Away 0 0 0 0 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.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
6.50
 
K/9
9.5
 
BB/9
1.5
 
HR/9
1.5
 
Fastball
100.0 mph
 
ERA
1.46
 
WHIP
0.81
 
BABIP
.216
 
GB/FB
1.27
 
Left On Base
97.2%
 
Exit Velocity
84.8 mph
 
Barrels/BBE
5.2%
 
Spin Rate
2095 rpm
 
Balls Hit 95+ MPH
27.6%
 
Swinging Strike
14.5%
 
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
Picks up first save
PColorado Rockies
September 22, 2024
Halvorsen picked up the save over the Dodgers on Saturday, allowing one hit and two walks in a scoreless ninth inning.
ANALYSIS
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Set for MLB debut
PColorado Rockies
August 30, 2024
The Rockies selected Halvorsen's contract from Triple-A Albuquerque on Friday.
ANALYSIS
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