Michael Saunders stepped on a sprinkler while shagging fly balls Wednesday, tearing cartilage in his left knee and sidelining him until the All-Star break.

The Toronto Blue Jays said surgery is likely, but Saunders will seek a second opinion.

Saunders said he felt a pop after stepping on a sprinkler head while going for a ball at the team's training facility.

"I just tried to walk off the field and not draw any attention to myself, then when I got into the training room, my knee felt like it was getting tight on the inside," Saunders said. "I've never had any issues with my knees, so that's when I knew that something was wrong."