An MRI exam revealed that San Francisco Giants infielder Pablo Sandoval needs surgery on his right hamstring, the club announced Thursday -- the same day that right-hander Johnny Cueto underwent Tommy John surgery. Manager Bruce Bochy told reporters in Phoenix that Sandoval, who went on the 10-day disabled list Monday, will have a season-ending operation next week. Sandoval sustained the injury sliding awkwardly into home on a sacrifice fly during Sunday's game.