Nady felt a sharp pain in his elbow while making a throw during the Rays game on Tuesday.
The Yankees acquired Nady, who had Tommy John surgery in 2001, from the Pittsburgh Pirates last summer. Nady had an MRI on his elbow yesterday.
"The original diagnosis wasn't great, but I'd rather let the team talk [today]," Nady said when asked of the MRI results. "It's frustrating. It's tough."To replace Nady on the active roster, the Yankees called up reliever David Robertson from AAA.
If Nady requires Tommy John surgery again, he'll be done for the year.