'McKelvin joined the Bills in 2008 as a first-round draft pick, 11th overall, from Troy (Ala.) University. He suffered a broken ankle that caused him to miss the final six games of the 2014 season, which he finished with a career-best four interceptions. A setback in his recovery caused him to sit out the preseason and first seven games of the 2015 season and opened the door for Darby to take over.'