I can see some logic in it. Eight games might not be enough to show that he IS the guy, but it might be enough to show that he's NOT the guy, or at least may not be the guy. Given that they're loaded with picks, if they draft another QB and both turn out to be good, they can always trade one of them. Either way, they've doubled their chances at finding a franchise QB, and since both would be on rookie contracts, they don't eat up too much cap space.