Tennessee Titans wide receiver Calvin Ridley (illness) and running back Tyjae Spears (concussion) missed practice Wednesday. Titans head coach Bill Callahan also said Wednesday that cornerback L'Jarius Snead (quad) has been ruled out for a sixth straight game. The Titans (2-8) are preparing for their game at the Houston Texans (7-4) on Sunday. Ridley, 29, had four catches for 58 yards last week, giving him 36 catches for 541 yards and three touchdowns on the season. Spears was injured late in Sunday's loss to the Minnesota Vikings. He'll have to be cleared from the concussion protocol to play against the Texans.