The Chiefs still don't know if quarterback Matt Cassel will be ready to play against the Raiders on Sunday. Cassel missed Kansas City's season opener because of an injury to his left knee. If Cassel is unable to start, Brodie Croyle will start for the second straight week. "Matt is doing everything he can to be ready," head coach Todd Haley said. "I would hope I would know a little sooner this week, although right now I can't give a definitive answer. But the player's doing everything he can to be ready, which generally helps speed the healing process."