Dodgers to acquire Seth Halvorsen from Rockies in trade
The Los Angeles Dodgers are acquiring right-handed reliever Seth Halvorsen from the Colorado Rockies in exchange for minor league righty Nick Frasso and outfielder Landyn Vidourek, according to New York Post reports. Halvorsen, currently on the injured list, adds high-velocity bullpen depth with years of club control left. The rare intra-division swap comes ahead of the 2026 trade deadline.
Key Takeaways
- Seth Halvorsen heads to Los Angeles; Nick Frasso and Landyn Vidourek go to Colorado.
- Halvorsen is on the 15-day injured list with shoulder inflammation and will finish a rehab stint at Triple-A Oklahoma City.
- The 26-year-old averages nearly 100 mph on his four-seam fastball and has more than five seasons of club control remaining.
- Division rivals rarely trade; the last Dodgers-Rockies deal was in 2023.
What did the Dodgers give up for Seth Halvorsen?
According to MLB Trade Rumors, citing Jon Heyman of the New York Post, Los Angeles is sending Frasso and Vidourek to Colorado. Frasso, a former top-100 prospect, has worked as a Triple-A reliever this season with a 4.74 ERA over 24.2 innings. The 27-year-old joined the Dodgers' 40-man roster in June but has yet to debut in the majors.
Vidourek was a third-round pick by Los Angeles in 2025. Rockies general manager Josh Byrnes, hired this past offseason after more than a decade in the Dodgers' front office, is familiar with both return pieces.
Why does Seth Halvorsen matter for Los Angeles?
Halvorsen brings elite velocity and remaining control to a club already leading MLB at 63-37. Career numbers across 71 major league innings show a 4.31 ERA, a 99.6 mph average four-seamer, a 12.4% swinging-strike rate, and a 48.8% ground-ball rate. Walks (12.1%) and home runs (1.52 HR/9) remain concerns.
This season he has posted a 4.74 ERA in 19 MLB innings, but Triple-A work has been sharper: a 2.04 ERA, 32.4% strikeout rate, and 99.9 mph average velocity in 17 1/3 innings. He is using a minor league option for the first time and will have two option years left after 2026.
The Dodgers have a track record of developing volatile bullpen arms, from Evan Phillips to Alex Vesia. Halvorsen fits that mold as a high-upside project rather than a finished closer.
When will Seth Halvorsen join the Dodgers bullpen?
Not immediately. Joel Sherman of the New York Post reported that Halvorsen will complete his rehab assignment at Oklahoma City first. Los Angeles can then option him or call him up when activated.
Bleacher Report noted that Dodgers-Rockies trades are uncommon; their last swap came in 2023 when L.A. sent Justin Bruihl to Colorado for cash. For more deadline buzz across markets, see our Fintech & Crypto Alerts desk coverage.
Los Angeles already fields a strong relief corps led by Tanner Scott, with several arms posting ERAs under 3.00, even as Edwin Díaz, Blake Treinen, Brusdar Graterol, and Ben Casparius remain sidelined. Adding Halvorsen's power repertoire deepens that group without surrendering major league talent.