49ers TE George Kittle separated his shoulder in Thursday night's preseason game. The good news is that an MRI revealed no tears or structural damage," according to NFL Network's Ian Rapoport. "Not serious," Rapoport added. Kittle still figures to miss practice time, though, and we can't consider him a lock to be ready for the start of the season. We'll keep an eye on his rehab. It's worth noting that, despite missing just 1 game last year, Kittle appeared on the injury report with hamstring, calf, hip, chest, back, elbow and ankle issues.