‘C.J. Gardner-Johnson, one of the Bills safeties, is still recovering from a calf injury. Cole Bishop, their other starting safety, missed time. Maxwell Hairston, a second-year cornerback, has not appeared in a preseason game in his pro career. He’s back from a groin injury, but he was held out of Buffalo’s win Saturday in Cleveland because he got 40-50 snaps in the joint practice two days earlier. The group hasn’t been on the field together at the same time for most of training camp.’