Robert Drysdale has no fight in the UFC yet and has already failed two doping tests. But it is not alone because Kevin Casey also failed a doping test, which will surely make him lose his last victory against Bubba Bush (by KO).
We don't know yet what the UFC will do with these results, but we bet that Drysdale will not remain in the organization. As for Casey, he might not be able to fight before 9 months. In a recent press release, the UFC has indicated that it would follow the recommancations of the Nevada State Athletic Commission.