Simpson, 24, spent his first two NFL seasons on and off the roster of the Indianapolis Colts. In 2009, Simpson logged 15 carries, three receptions, and 38 kick returns - including a kick return for a score - in 14 appearances with the AFC champions. The 5'9", 216-pound Morgan State product is a speed back by trade, and also adds to the Bills' abundance of resources at the kick returner position.
The Bills now have eight running backs on their roster. Multiple reports indicate that the team tried out fullback Kyle Eckel on Tuesday as well.
Favorite was signed by the Bills in January, and spent this past weekend's rookie mini-camp taking snaps at defensive end and nose tackle. His release leaves the Bills three deep at nose tackle, with veteran Kyle Williams, rookie Torell Troup and the little-known Lonnie Harvey making up the depth chart.