Diamondbacks manager Torey Lovullo relayed on Friday that the right-handed pitcher will undergo Tommy John surgery, ruling him out for the rest of the season. He's also likely to miss the beginning of next season.

Earlier this week, Martínez landed on the IL and the Diamondbacks announced his injury as a sprain of his right ulnar collateral ligament. A sprain, by definition, involves some degree of stretching or tearing.