What It Means:

Bieber's pitching elbow caused problems for him last season, which led to just 21 starts and 128.0 innings pitched. He saw a velocity resurgence over the offseason, but now, after experiencing pain after his first two starts of the season, he will have surgery to reconstruct his Ulnar Collateral Ligament. It's a brutal blow for both Bieber and the Guardians. When he returns from the injured list, Gavin Williams will likely assume Bieber's spot in the starting rotation.

In 2 starts this season, Bieber pitched 12 scoreless innings with 20 strikeouts and a walk.