Source: Matt Cassel concussed
KANSAS CITY, Mo. -- Chiefs quarterback Matt Cassel lay flat on his back in the fourth quarter, staring up at the sky, where just a few hours earlier an airplane towed a banner calling for him to be benched.
This wasn't how anybody expected his time as Kansas City's starting quarterback to end.
Cassel was eventually helped to his feet and walked off the field on his own, going up the tunnel and into the locker room with what later was diagnosed with a concussion, a source told ESPN ...
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