FILE - In this Aug. 8, 2019, file photo, Buffalo Bills defensive tackle Ed Oliver (91) plays during the first half of an NFL preseason football game against the Indianapolis Colts in Orchard Park, N.Y. If the Buffalo Bills drafted Oliver with the expectation to replace Kyle Williams at defensive tackle, who better than having the just-retired player pop in at training camp and provide the rookie a weeklong crash course. Oliver happily referred to Williams as being his "cheat code" to the NFL. (AP Photo/Adrian Kraus, File)

FILE - In this July 25, 2019, file photo, Buffalo Bills defensive tackle Ed Oliver, left, runs a drill during practice at the NFL football team's training camp in Pittsford, N.Y. If the Buffalo Bills drafted Oliver with the expectation to replace Williams at defensive tackle, who better than having the just-retired player pop in at training camp and provide the rookie a weeklong crash course. Oliver happily referred to Williams as being his "cheat code" to the NFL. (AP Photo/Adrian Kraus, File)