Rangers' Collin Wiles: Undergoes Tommy John surgery

Wiles underwent successful Tommy John surgery Monday, Evan Grant of the Dallas Morning News reports.

Wiles will be sidelined for 12-to-18 months following this dreaded procedure. Prior to this injury, Wiles had posted a 6.10 ERA and 1.58 WHIP over 20.2 innings with Double-A Frisco this year.