I hate to get so danged picky, but....
I am not so sure this statement is true...and certainly we'd all agree that the NCAA has never proven itself to be so predictable that we can be so sure what they'd decide! I'm not saying that by playing tonight he'd ruin his chance of redshirting, but he almost certainly would AFFECT it as it would then cause Bradley to have to present evidence as to why he was cleared to play if he had a "season ending injury" - which is one of the requirements...
As most know...the single MOST significant requirement a player must fulfill to get a medical "reshirt" is a verifiable injury
that is season ending. (of course it must also occur before the midpoint of the season and he cannot play > 30% of scheduled contests).
But if a player HAS an injury (AW apparently was well enough to play in an exhibition earlier) and then comes back and plays again it may make it harder to argue the case to the NCAA that the injury WAS indeed sufficient to end AW's season, and they might just give some trouble accepting the evidence.
The purpose of the rules is to prevent a kid who is perfectly recovered and able to play, from taking the rest of the season off since maybe it is clear the team is bad this year and he just wants to have an extra year.
This was the argument made with Bill Cole, that he actually did come back from his injury, proving he was cleared to play!