According to Marc Topkin of the Tampa Bay Times, Tampa Bay Rays prospect Brent Honeywell has a torn UCL and will undergo Tommy John surgery. 

The 22-year-old right-hander got hurt Thursday while facing major league batters for the first time this spring.

Honeywell left the mound during a live batting practice session with what the team diagnosed as a right forearm strain.

Honeywell is regarded as one of the top pitching prospects in baseball. He was MVP of last year's All-Star Futures Game and went 12-8 with a 3.64 ERA in 24 starts for Triple-A Durham last season.