Seth Halvorsen
Pitcher · Career Stats, Bio & Records (2024-2026)
Seth Halvorsen is a pitcher who has played in Major League Baseball since 2024 for the Colorado Rockies and the Los Angeles Dodgers, a span of 3 seasons. Across 86 career appearances, he has gone 4-5 with a 4.78 ERA and 72 strikeouts.
- W (Wins):
- Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
- ERA (Earned Run Average):
- Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
- SO (Strikeouts):
- For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
- WHIP (Walks and Hits per Inning Pitched):
- Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.
Data updated
- Position
- Pitcher
- Bats / Throws
- R / R
- Height / Weight
- 6'2" / 225 lb
- MLB Debut
- 2024-08-30
Full name: Seth Michael Halvorsen
Season-by-Season Pitching
Click a stat to plot it across every season.
| Year | Team | Lg | W | L | G | GS | CG | SHO | SV | IP | H | ER | BB | SO | ERA | Lg ERA | Pitcher PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | COL | NL | 2 | 1 | 12 | 0 | 0 | 0 | 2 | 12.1 | 8 | 2 | 2 | 13 | 1.46 | 4.08 (+64%) | 56.2 |
| 2025 | COL | NL | 1 | 2 | 42 | 0 | 0 | 0 | 11 | 39.2 | 41 | 22 | 21 | 36 | 4.99 | 4.16 (-20%) | -1035.2 |
| 2026 | LAD | NL | 1 | 2 | 32 | 0 | 0 | 0 | 0 | 29.0 | 33 | 19 | 17 | 23 | 5.90 | 4.18 (-41%) | - |
| Career · 3 seasons | 4 | 5 | 86 | 0 | 0 | 0 | 13 | 81.0 | 82 | 43 | 40 | 72 | 4.78 | — | -979 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Season-by-Season Batting
Click a stat to plot it across every season.
| Year | Team | Lg | G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | Lg AVG | Lg OBP | Lg SLG | Lg OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | COL | NL | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 2025 | COL | NL | 42 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| Career · 2 seasons | 54 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | 0 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Game Log & Splits
View full game log (108 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 30 | 0 | 0 | 0 | 0 | 0 | — |
| Away | 24 | 0 | 0 | 0 | 0 | 0 | — |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 30 | 31.1 | 25 | 11 | 11 | 37 | 3.16 |
| Away | 24 | 20.2 | 24 | 13 | 12 | 12 | 5.66 |
Last 10 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-08-02 | COL | PIT | — | 0.0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 2025-07-28 | COL | CLE | SV | 1.0 | 1 | 1 | 1 | 2 | 1 | 0 |
| 2025-07-25 | COL | BAL | SV | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-07-22 | COL | STL | — | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 |
| 2025-07-18 | COL | MIN | SV | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 |
| 2025-07-09 | COL | BOS | — | 0.0 | 4 | 5 | 5 | 1 | 0 | 2 |
| 2025-07-06 | COL | CHW | SV | 1.0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 2025-07-03 | COL | HOU | SV | 1.1 | 3 | 1 | 1 | 0 | 1 | 0 |
| 2025-06-29 | COL | MIL | — | 1.0 | 2 | 0 | 0 | 1 | 1 | 0 |
| 2025-06-26 | COL | LAD | — | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 |
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 54 |
Seth Halvorsen: the record in brief
Seth Halvorsen's major league record starts with the debut on August 30, 2024 and remains open, because the career is ongoing. Every season row on the page belongs to the Colorado Rockies, from 2024 through 2025. Halvorsen, born on February 18, 2000, in Chicago, IL, USA, is listed as a pitcher and both batted and threw right-handed. The bio gives 6'2" and 225 pounds. The bio lists the given name Seth Michael.
The pitching table credits Halvorsen with a 4-5 record and a 4.78 ERA in 86 games. Also on Halvorsen's record: 72 strikeouts and 13 saves. The league ERA over Halvorsen's seasons was 4.14, so the 4.78 figure ran 15.5% worse than average. Halvorsen saved 11 games in 2025, the season high. In 2025, one of the busiest seasons, Halvorsen posted a 4.99 ERA; the league figure that year was 4.16.
Halvorsen's game-by-game log, linked below the splits, holds 108 games from Retrosheet.
The position breakdown shows 54 games, all at pitcher. On the mound, Halvorsen's fielding totals are 8 putouts, 5 assists and 1 errors.
Frequently Asked Questions about Seth Halvorsen
- What years did Seth Halvorsen play?
- Seth Halvorsen played in Major League Baseball from 2024 to 2026.
- Was Seth Halvorsen a pitcher?
- Yes. Seth Halvorsen pitched in the major leagues, recording 4 wins and 72 strikeouts.
- What was Seth Halvorsen's career ERA?
- Seth Halvorsen finished with a 4.78 career ERA, going 4-5 with 72 strikeouts.
- How many strikeouts did Seth Halvorsen have?
- Seth Halvorsen recorded 72 career strikeouts.
- Is Seth Halvorsen in the Hall of Fame?
- No. Seth Halvorsen has not been inducted into the National Baseball Hall of Fame.
- What teams did Seth Halvorsen play for?
- Seth Halvorsen played for the Colorado Rockies and the Los Angeles Dodgers.