Glasnow placed on injured list with partial UCL tear, flexor strain
The team will place Glasnow on the 10-day injured list, and a timetable for his return will be determined after further medical evaluation, according to the Rays.
Glasnow left Monday's contest against the Chicago White Sox after four innings and was seen shaking out his arm before exiting.
Following Monday's game, Tampa Bay's ace said he felt a "little tug" in his right elbow but wasn't experiencing "crazy pain."
The 27-year-old is 5-2 with a 2.66 ERA and 2.75 FIP in 14 starts for the first-place Rays. Glasnow has also amassed 123 strikeouts in 88 innings.
The Rays have recalled utility player Mike Brosseau to take Glasnow's place on the active roster.