Injured and could easily reaggravate the injury.

Second, we already know our backup quarterback in Hoge is out with concussion.

Third, our 3rd string quarterback is a walk on who obviously didn't impress. I'll take my chances with Critchlow over Detmer who lacks the physical attributes

Fourth, Tanner has been playing poorly and if he needs to be benched let's put in a guy who has talent and a possible future.

Fifth, if Critchlow has potential let's start giving him reps. Right now I don't see nearly enough from Tanner to suggest that he deserves to be the starter next year. Give Critchlow reps now in practice and in games either due to an injury to Tanner, or mop-up duty, or if Tanner is just playing like garbage.

It's not unreasonable to think Critchlow could be the starter next year if Tanner keeps playing like he is.