‘The Buffalo Bills got a scare Tuesday over a knee injury to reserve running back Shawn Bryson, and also announced that rookie receiver Kwame Cavil will be out 10 to 14 days with a strained calf muscle. Bryson twisted his left knee as he went down hard to the ground on a running play in Tuesday afternoon’s practice. A magnetic resonance imaging test Tuesday evening proved negative. Bryson is listed as day-to-day for practice this week. Bryson, a third-round draft choice last year, was met at the line of scrimmage by linebacker Keith Newman, who had filled a gap on the play. Bryson immediately slammed the ball to the turf after hitting the ground. He was able to walk off the practice field and into the locker room under his own power. The injury occurred to the same knee that underwent reconstructive surgery last year after an injury in training camp. "It’s fine," Bryson said as he made his way to the locker room. Cavil, meanwhile, injured his left leg in Monday’s practice. "It’s going to be close as to whether he’s ready to play for the next game," coach Wade Phillips said, referring to the second preseason game, at Detroit on Aug. 12.’