Rockies RHP Winkler to undergo Tommy John surgery


Colorado Rockies right-handed pitching prospect Daniel Winkler will undergo Tommy John surgery, the Denver Post reported Wednesday.

Winkler injured his right elbow on Saturday while pitching for Double-A Tulsa. An MRI confirmed Winkler tore his ulnar collateral ligament.

Winkler was 5-2 with a 1.41 ERA in 12 starts, with 71 strikeouts in 70 innings.