Tampa Bay Rays right-hander Tyler Glasnow is expected to undergo Tommy John surgery next week, sources told ESPN, after attempts to rehabilitate a partially torn ulnar collateral ligament in his elbow left him still in pain.

While there remains a possibility that Dr. Keith Meister, who will examine Glasnow next week, will recommend against the procedure, the likelihood is that the ace of the Rays' pitching staff will miss the remainder of the 2021 season -- and perhaps all of 2022 as well.