A lot of people like to speak on rumor rather than fact. That is a trait of a girl (gossip). Why say anything if you arent sure? Some people have the opinion that he uses something, but a lot of people are stating this as fact.
Nelson, I know you are very intelligent, especially in regards to anabolics, but I dont believe they would help boxers at all. I dont believe introducing any kind of variable to a boxer is good. You mentioned methyl-test. Unfortunately I have had this before, it made me sick as hell. It has the same effects on others. The last thing a boxer needs is to be sick in the ring. Muscle pumps and boxers that are too muscle bound are too tight during a fight and have a hard time getting off shots.
Vargas was defeated by delahoya. Vargas tested positive for winny. He was aggresive as hell but there is a good possibility that the winny hindered him in that fight.
Last, boxers are given a urine test in front of an official after the fights. Now im sure this can be compromised somehow, it is part of the rules. Our friend Tyson has only declined to be tested 1 time. Most people believe this to be because he tested positive for marijuana a few days later.
Now, I cant say one way or another if any boxer uses steroids unless I know them personally and have seen them take steroids, but I dont see how it would help them that much and I believe they wouldnt see it as worth the risk of fines and getting belts stripped.