Astros ace Justin Verlander underwent surgery on his right groin on Tuesday and is expected to be out for six weeks, general manager James Click announced.
"Initially, the hope was that physical therapy would be the proper course of action," Click said in a statement. "However, after a recent setback in his rehab, the medical staff recommended that a surgical procedure was necessary. The early prognosis is that Justin will be out for six weeks."
Verlander's surgery came less than 10 days after the club shut him down with a mild lat strain during spring training.