Tampa Bay Rays pitcher Tyler Glasnow, the major league leader in wins and ERA entering Friday, has been placed on the 10-day injured list after leaving his start against the visiting New York Yankees on Friday with right forearm tightness.
Glasnow motioned to the Rays' dugout after striking out Gleyber Torres on a curveball for the first out of the sixth inning. Tampa Bay's athletic training staff went to the mound and briefly chatted with Glasnow, who quickly walked off the mound and into the Rays' clubhouse.
"I don't really know what's going on right now," Glasnow said after the game. "I'm just going to be optimistic. It wasn't a pop or anything crazy. I just felt tightness for a couple pitches."
Along with Glasnow's IL move, the Rays activated catcher Travis d'Arnaud, whom Tampa Bay acquired in a trade Friday, and recalled shortstop Andrew Velazquez from Triple-A Durham. Catcher Nick Ciuffo was optioned to Durham.
Glasnow, a 6-foot-8 righty, had struck out nine and allowed five hits before exiting with a 3-2 lead. He was replaced by Emilio Pagan, who allowed both inherited runners to score. The 4-3 score would hold, resulting in Glasnow's first loss of the season.
D'Arnaud, the former New York Mets catcher, made only one pinch-hit appearance with the Dodgers after signing with them Sunday. He was traded to Tampa Bay for $100,000.
The Associated Press contributed to this report.