The Detroit Lions have listed safety Louis Delmas and tight end Tony Scheffler as doubtful to play in their game against the Tennessee Titans.

Delmas was held out of practice Friday and hasn't played in the first two games while recovering from surgery on his left knee. Scheffler missed practice because of a calf injury.

Cornerbacks Chris Houston (ankle) and Bill Bentley (concussion) are listed as probable for Sunday's game at Tennessee. Houston hasn't played this season and Bentley missed the second game. Cornerback Jacob Lacey (toe) and defensive tackle Corey Williams (knee) were limited in Friday's practice and are questionable to play against the Titans.