Buffalo Bills rookie cornerback Maxwell Hairston is out indefinitely after the first-round draft pick was diagnosed with a sprained lateral collateral ligament in his right knee, a person briefed on the injury told The Associated Press on Wednesday. The person spoke to the AP on condition of anonymity because the team is off and hasn’t provided an update on Hairston’s injury since he was hurt in practice a day earlier. No timetable was provided for how much time Hairston will miss with the injury, which is not as severe as initially feared.