Bills place DT Torell Troup on IR

ORCHARD PARK, N.Y. -- Backup defensive tackle Torell Troup has become the latest Buffalo Bill to land on season-ending injured reserve.

Troup was placed on the list Wednesday as a result of a back problem that's nagged the second-year player since training camp. The 2010 second-round draft pick out of Central Florida has missed five games this season, including a 28-24 loss at the New York Jets last weekend after his back locked up a day earlier.

Defensive end Lionel Dotson was promoted off the team's practice squad as Buffalo (5-6) prepares to host Tennessee (6-5) on Sunday.

The Bills also signed linebacker Robert Eddins to their practice squad.

Troup becomes the ninth Bills regular to be placed on IR this season. It's a group that includes starting defensive tackle Kyle Williams (foot).