He might play anyway.
Cassel's name was not among the list of inactive players Kansas City submitted 90 minutes before kickoff. The Chiefs named Tyler Palko as their third quarterback. The Chiefs did not immediately disclose any lineup changes. Cassel or Brodie Croyle could start at quarterback.
Cassel has already missed one game since having an appendectomy. He practiced on a limited basis during the week and did not participate fully in warm-ups at the Edward Jones Dome on Sunday morning. Croyle and Palko threw intermediate routes to receivers running at full speed. Cassel tossed soft 8-yard passes to a team staffer while working off to the side.
The Chiefs' inactive list featured cornerback Mike Richardson, safety Ricky Price, fullback Mike Cox, safety Reshard Langford, linebacker Charlie Anderson, center Rudy Niswanger and defensive tackle Anthony Toribio.
Inactive for the Rams: safety Michael Lewis, cornerback Justin King, running back Kenneth Darby, fullback Mike Karney, linebacker David Nixon, guard John Greco, receiver Mardy Gilyard and tight end Mike Hoomanawanui.
The situation at running back is a little troubling for the Rams. Darby is the top backup for Steven Jackson. The team has been naming Karney inactive by choice.
Rookie Keith Toston is the No. 2 running back behind Jackson.