Roberto Perez to have season-ending hamstring surgery

This isn’t good.What should have been a simple rounding of second base has turned into a significant issue for the Pirates.

Roberto Perez, who was signed to replace Jacob Stallings after the Cheetah was traded to the Miami Marlins, injured his hamstring on that May 7 base run. Pirates director of sports medicine Todd Tomczyk announced this afternoon that Perez will have surgery on the hamstring, ending his season.

Perez was already not expected to return until July, having been placed on the 60-day injured list on May 11, so this is a blow to a position that’s already seen some struggles this year.

“I think we were all hoping that surgery would not be where it was going and trying to hold off…