Martin has been diagnosed with a right lat tendon tear, JJody Jackson of Bally Sports Arizona reports.
As Jackson notes, this will cause Martin to miss months and not weeks while he recovers from the injury, and surgery cannot be ruled out at this time. The right-hander was diagnosed with shoulder soreness initially, but imaging revealed the tear. He'll begin the season on the IL, and likely won't be able to help the Diamondbacks until sometime this summer, at the very earliest.