Melvin said on Tuesday that the left-hander will require exploratory surgery on his pitching shoulder. Braden has been recovering since having a procedure done on the shoulder in May 2011, and it appears his recovery will take longer.
"With Dallas Braden, we've had a setback there," Melvin said. "His shoulder hasn't responded in the past couple weeks in the fashion that we had hoped. He will have another surgery. When that is, we're not sure yet. We had talked with Dr. [David] Altchek, I think [Monday], and they're going to go in there and do an exploratory-type surgery."
Altchek, medical director for the New York Mets, is the doctor that performed Braden's surgery last year.
In addition, outfielder Seth Smith, who's currently on the 15-day DL with a strained left hamstring, has been running and swinging the bat at full strength, according to Melvin.