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.

Bills rookie Maxwell Hairston suffered a right LCL sprain but avoided a major injury, with his ACL intact, a source confirmed to ESPN.

The Buffalo Bills have battled through a slew of injuries in the early going of training camp, with 11 players missing Monday’s session at St. John Fisher University. On Tuesday, first-round cornerback Maxwell Hairston was added to the list of the walking wounded after appearing to suffer a non-contact injury to his right knee.