Here is a very cynical thought. Not saying it is true, but it is an interesting thought.
Dan has to play Cody because he has insisted no one is better. If someone plays better than Cody now, Dan is discredited. If Cody can beat Klatt’s all time passing record, then Dan can tout Cody’s record breaking resume. Red shirt the two biggest threats, get Cody the record and wave it in vindication. Now Cody can play his senior year because you can’t sit the all time pass leader over a red shirt freshman. Tyler never sees the field again as a Buff, because if he does well, there will always be questions. Cody currently needs 1716 yards to get the record. (191 Yards per game)
What will Dan do if Cody gets hurt? Does he roll out a QB and scheme that proves Cody is the best, or does he save his Job?