Indians center fielder Grady Sizemore left Sunday's game against the Orioles in the first inning with what the team described as a right knee contusion. Sizemore suffered the same type of injury in May and missed two weeks. The extent of this injury isn't yet known. In the top of the first inning, Sizemore doubled to left field and made an awkward turn around first base. Sizemore has hit .400 (8-for-20) with two homers, two doubles and four RBIs over his past six games. He opened the year on the 15-day disabled list while recovering from microfracture surgery on his left knee. He returned in mid-April after a 10-month rehab process, but was sidelined in May with the unrelated knee issue.