Zach Eflin Undergoes UCL Surgery

The Orioles announced that Zach Eflin underwent UCL reconstruction (Tommy John) surgery today. He’ll miss the rest of the season and probably at least the first half of 2027.

Things had seemingly been trending in this direction. Eflin, who turns 32 today, left his season debut citing elbow discomfort. The team announced last week that he was going for a second opinion, implying the initial prognosis wasn’t good. The reexamination evidently confirmed the ligament damage that required surgical repair.

It’s another injury-wrecked season for Eflin, a mid-rotation caliber starter who has an unfortunately checkered health history. He battled chronic knee issues early in his career with Philadelphia. Eflin stayed mostly healthy between 2023-24 despite intermittent back discomfort, combining for a 3.54 ERA with a 23.1% strikeout rate over 343 innings between the Rays and Orioles.

The more significant injuries have resurfaced over the past two seasons. Eflin sustained a lat strain early in 2025. That shelved him for a month. He quickly returned to the injured list with lower back discomfort. After a brief reinstatement, he underwent season-ending lumbar surgery. Eflin made an encouraging return from that procedure and entered this season with no restrictions, but he could only complete 3 2/3 frames before his elbow gave out.

Baltimore re-signed Eflin to a one-year, $10MM free agent contract last offseason. That’ll go down as an unfortunately lost investment. Eflin, whom the O’s have already moved to the 60-day injured list, will return to the open market at season’s end. He’ll likely look for a two-year deal to cover his rehab season. That might need to be a minor league contract given his age and recent durability record.

Trevor Rogers, Kyle Bradish, Shane Baz and Chris Bassitt remain Baltimore’s top four starters. They recalled lefty Cade Povich as a potential fifth starter on Sunday. He was needed in relief of Bassitt, who was shelled and only made it through two innings against the Pirates. Povich tossed 5 2/3 innings of two-run ball in relief. Brandon Young made a spot start on Monday and was optioned back to Triple-A postgame.

The O’s are off tomorrow and list Baz, Bassitt and Povich as the probable starters for their weekend series against the Giants. Rogers and Bradish, who started the final two games of this week’s series against the White Sox, would line up early next week against the Diamondbacks. It seems they’ll give Povich first look as Eflin’s replacement in the rotation. Young and Dean Kremer are on optional assignment with Triple-A Norfolk.