SF @ LADFinal 4-10, Sep 19, 2026
IP 1.0, H 0, R 0, ER 0, BB 0, K 2, HR 0, PC-ST 15-10, ERA 5.90, PC 15
Betting: LAD moneyline won
BaseballMLBLos Angeles DodgersRelief pitcher
Seth Halvorsen
Stats, career and game logSeth Halvorsen is a relief pitcher for the Los Angeles Dodgers who made his MLB debut on Aug 30, 2024, with the Colorado Rockies.
86 MLB games72 strikeouts
Updated
About Seth Halvorsen
Born on February 18, 2000, in Chicago, Illinois, in the United States, Halvorsen is a relief pitcher for the Los Angeles Dodgers in MLB, and he wears number 56. He bats right-handed and throws right-handed.
Halvorsen pitched in 42 games for the Colorado Rockies in the 2025 regular season, with a 4.99 ERA and 36 strikeouts in 39.2 innings. Through the 2025 season, he had a 4.15 ERA and 49 strikeouts in 52.0 innings over 54 games.
Halvorsen pitched 1.0 innings of relief without allowing a hit or an earned run, with 2 strikeouts, in a 10-4 win against the San Francisco Giants on Sep 19, 2026. Earlier he allowed 1 earned run on 2 hits over 1.0 innings with 1 strikeout in an 8-2 win at the Cincinnati Reds on Sep 17, 2026, and before that gave up 2 earned runs on 2 hits over 1.0 innings in a 6-2 loss at the Cincinnati Reds on Sep 16, 2026.
Agatha Research DeskUpdated Oct 28, 2026Season by season86
Every season, every MLB appearance of his career, newest season first.
| Season | Team | Games | Starts | IP | K | BB | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|
| 2026 | COL, LAD | 32 | 0 | 29.0 | 23 | 16 | 4.97 | 1.55 |
| 2025 |  COL | 42 | 0 | 39.2 | 36 | 21 | 4.99 | 1.56 |
| 2024 | COL | 12 | 0 | 12.1 | 13 | 2 | 1.46 | 0.81 |
| Career | 86 | 0 | 81.0 | 72 | 39 | 4.44 | 1.44 |
How he is doing now
2026 pitching4.97 ERA29.0 innings, 23 strikeouts, 1.55 WHIP
Dodgers100-622026 regular season, 3-5 in the playoffs
Last game1.0 IP, 2 K, 0 ERSep 19 vs Giants
Injury status
No injury reports on file.
Game log, 2026
LAD @ CINFinal 8-2, Sep 17, 2026
IP 1.0, H 2, R 1, ER 1, BB 0, K 1, HR 0, PC-ST 16-9, ERA 6.11, PC 16
Betting: LAD moneyline won, run line -1.5 covered
LAD @ CINFinal 2-6, Sep 16, 2026
IP 1.0, H 2, R 2, ER 2, BB 0, K 0, HR 1, PC-ST 18-10, ERA 6.00, PC 18
Betting: LAD moneyline lost, run line -1.5 did not cover
LAD @ MIAFinal 3-4, Sep 12, 2026
IP 1.0, H 0, R 0, ER 0, BB 0, K 1, HR 0, PC-ST 9-5, ERA 5.54, PC 9
Betting: LAD moneyline lost, run line -1.5 did not cover
Show all 10 games
CIN @ LADFinal 1-14, Sep 9, 2026
IP 1.0, H 1, R 0, ER 0, BB 0, K 1, HR 0, PC-ST 10-8, ERA 5.76, PC 10
Betting: LAD moneyline won, run line -1.5 covered
CIN @ LADFinal 3-6, Sep 7, 2026
IP 1.0, H 2, R 1, ER 1, BB 0, K 0, HR 1, PC-ST 14-10, ERA 6.00, PC 14
Betting: LAD moneyline won, run line -1.5 covered
WSH @ LADFinal 3-5, Sep 4, 2026
IP 0.0, H 3, R 3, ER 3, BB 0, K 0, HR 0, PC-ST 14-9, ERA 5.87, PC 14
Betting: LAD moneyline won, run line -1.5 covered
STL @ LADFinal 13-8, Sep 1, 2026
IP 1.0, H 1, R 2, ER 2, BB 1, K 1, HR 1, PC-ST 21-12, ERA 4.70, PC 21
Betting: LAD moneyline lost, run line -1.5 did not cover
LAD @ DETFinal 6-1, Aug 30, 2026
IP 1.0, H 0, R 0, ER 0, BB 0, K 0, HR 0, PC-ST 8-6, ERA 4.09, PC 8
Betting: LAD moneyline won, run line -1.5 covered
LAD @ DETFinal 1-2, Aug 29, 2026
IP 1.0, H 0, R 0, ER 0, BB 0, K 0, HR 0, PC-ST 11-6, ERA 4.29, PC 11
Betting: LAD moneyline lost, run line -1.5 did not cover
Box score lines from ESPN.
Betting: his team's result at the closing moneyline and run line most of our sportsbooks closed at (3 books or more).
Career
2years2024 to 2026
- 2024MLB debut5-3 loss vs Orioles
- 2025Best season39.2 IP, 36 K, 4.99 ERA in 42 games
- Sep 19, 2026Latest game1.0 IP, 2 K, 0 ER vs Giants
Regular season
84 games
81.0 IP, 72 K, 4.44 ERA
First MLB game
Aug 30, 2024: 0.1 IP, 0 K, 0 EROrioles 5, COL 3
Latest game
Sep 19, 2026: 1.0 IP, 2 K, 0 ERDodgers 10, Giants 4
Most often against
The teams he has faced most, with his teams' record and his line against each.
Arizona Diamondbacks9 games
3-6his teams
His line: 8.2 IP, 10 K, 3.12 ERA
Last met May 24, 2026
Cincinnati Reds6 games
3-3his teams
His line: 6.0 IP, 3 K, 6.00 ERA
Last met Sep 17, 2026
Milwaukee Brewers6 games
4-2his teams
His line: 5.0 IP, 5 K, 5.40 ERA
Last met Jun 5, 2026
Los Angeles Dodgers5 games
1-4his teams
His line: 4.2 IP, 5 K, 1.93 ERA
Last met Jun 26, 2025
San Francisco Giants5 games
3-2his teams
His line: 5.0 IP, 7 K, 0.00 ERA
Last met Sep 19, 2026
Washington Nationals5 games
3-2his teams
His line: 4.0 IP, 4 K, 2.25 ERA
Last met Sep 4, 2026
Sources and updates
Stats, scores and injury reports come from Agatha's own records: the SABR Lahman Baseball Database for the seasons through 2025, MLB's own box scores, its transactions and ESPN's injury reports.
Updated Oct 28, 2026, 6:36 AM ET. Results and form refresh after every game; biography facts are checked weekly.