re: Rules on Redshirting

I'd wager is because the staff decided early on that he was better than Rivers, and named him the backup. Thus, if anything happens to Mett, they wanted the guy they send in to have at least some experience taking snaps in live action, interacting with the first time O-line, etc. I also think they planned on having him play more, but the huge improvement by Mett coupled with AJ fumbling against UAB has diminished that time.