Okay, it might be silly in this day and age to test for weed in a post fight drug test. It's not performance enhancing, doesn't help in recovery, nothing relating to what goes on in the ring. Still, it's the rule under the athletic commission. It's not a surprise, especially since it's the second time he's taken a hit for it. If it's dumb to test for it, it's got to be even dumber to get caught using it.