I would say that after we got off to such a dismal start many kids probably didn't see the bowl game drug testing ever happening!! In addition, there are probably several substances that could be tested for other than weed, performance enhancing as well, but I agree it's probably weed... but as active as these guys are should not stick in their system that long.. They probably had enough time post Mizzu game to get clean, unless they took the test right after Temple, who knows.
But as soon as win 6 comes, they all know they are most likley going to be pissing in a cup at some point, my guess is there are 5-6 others that got lucky ... two that didn't. Just a guess.
Again, we are talking weed here, not really worried but rules are rules... You would think they would be smarter in season