While Cassel's performance isn't entirely to blame for the defeat, his two turnovers directly resulted in touchdowns for the Chargers. The quarterback now has 18 turnovers in just seven games played this season.
Ironically, Quinn was knocked out of that game with a head injury of his own and was unable to recover during the quick turnaround for Thursday night's game.
However, what happens when Quinn is cleared to play again?
Does he reassume his role as starter over Cassel or does he become the backup again? Or, honestly, does it even matter?
Neither quarterback has consistently gotten the job done this year, or previously in their careers for that matter. But there is one major difference with how each was installed under center recently.
Cassel's dreadful play indicated that he would eventually be replaced as the starter; his injury made that decision easier for head coach Romeo Crennel.
If Brady Quinn is healthy, who should start at QB for the Chiefs?
Quinn—who really only had one game to prove his worth—was replaced solely because of injury, so the decision to switch back to him when healthy should be a no-brainer.
The Chiefs are going nowhere in 2012 and neither quarterback is expected to be the starter in 2013. With that said, one might think that it doesn't matter who finishes out the season under center.
However, having Cassel as the starter—if Quinn is healthy—will further distance a downtrodden fanbase from its team. It will show a complete disregard for admitting that a mistake was made by sticking with Cassel so long.
The fans are to a point that any change will do, whether it is at head coach, general manager, ownership or quarterback.
Since Cassel is the most easily moved part, Quinn should get the nod at quarterback the rest of the season.