Corbin, 24, had been slated to pitch for the Diamondbacks when their season gets underway in Australia.
It is a tough blow for the Diamondbacks and Corbin who posted a 3.41 ERA and a 1.17 WHIP across 208 1/3 innings last season.
Medical update: Patrick Corbin underwent an MRI last night that showed damage to the ulnar collateral ligament in his left elbow. (cont.)
— Arizona Diamondbacks (@Dbacks) March 16, 2014
Corbin will receive a second opinion on his elbow this week but all signs are currently pointing to him having Tommy John surgery. Wade Miley will now get to start for the Diamondbacks when they open the season against the Los Angeles Dodgers.