Seattle Mariners pitcher Logan Gilbert exited his start Friday against the Miami Marlins after throwing three perfect innings due to right forearm tightness.
The right-hander was removed before the fourth inning of the eventual 8-4 loss. He had thrown 29 pitches.
Following the game, Gilbert is likely headed for MRI on Saturday to determine the extent of the injury.
Sources familiar with the situation indicated initial medical assessments showed modest concern, but expressed optimism that the ulnar collateral ligament is intact.
Gilbert's velocity was slightly reduced across his pitches during the brief outing. His fastball speed was down about 1 mph from his season average.
The pitcher reported noticing the issue while warming up and said it did not improve.
This marks the first time Gilbert has left a start early in his career since his debut in 2021. He had previously avoided the injured list.
The Mariners rotation is already without fellow All-Star George Kirby, who has been sidelined since March with shoulder inflammation. Kirby recently threw a bullpen session Friday and is weeks away from returning.
Logan Gilbert entered Friday's game with a 2.63 earned run average. He led Major League Baseball with 208 2/3 innings pitched last season and finished sixth in American League Cy Young voting.
Gilbert commented on the situation after the game.
“I don't want to make it like a pity party about myself,” Gilbert said. “But I take a lot of pride in that, just kind of how I want to be known -- eating innings and being dependable and being healthy. I can't control all of that. But I've been healthy and never really came out of a start. I think this is the first one."
