Phillies manager Rob Thomson said Friday that Chace will undergo Tommy John surgery, Lochlahn March of The Philadelphia Inquirer reports.

EDGE Analysis

Chace made six starts with Double-A Reading this season before blowing out his elbow, collecting a 3.24 ERA and 19:12 K:BB over 16.2 innings. The 21-year-old will likely be sidelined until around midseason next year.