Scott is a nine-year veteran, who will return to Buffalo for a sixth season. Listed at 6-foot-1 and 220 pounds, Scott is a versatile role player, who can play both safety and linebacker. He had two interceptions, one sack and recovered a fumble for a touchdown in 16 games, including seven starts, last season.
Scott's return, announced Wednesday, was expected after the Bills had previously indicated they would like him back.
Selected by Atlanta in the second-round of the 2003 draft, the Penn State product spent his first three seasons with the Falcons and also played a year in New Orleans before signing with Buffalo in 2007.