Toone spent his rookie season last year on the Lions practice squad after being drafted in the seventh round by Detroit. He had 3,602 yards receiving and 29 touchdowns in 46 career games at Weber State.
He was signed Tuesday, a day after coach Chan Gailey said starting receiver Donald Jones will miss between four and six weeks with a sprained ankle. Jones was hurt in a 31-24 win over Philadelphia on Sunday.
To make room for Toone, the Bills released defensive back Brandon Bing from their practice squad.
Copyright 2011 by The Associated Press