What Other Fighters use Xylocaine?

Everyone keeps talking about how Floyd use Xylocaine even though nobody can tell me one fight they know he for a fact that he used it in but thats not the point. The point is if everyone wants to get mad at Floyd and call him a cheater then why don't they do the same to all the others fighters who use or has used Xylocaine? Now I know for a fact Freddie Roach said he uses Xylocaine so why no talk him why only Floyd? Bottom line is if you want to try to knock Floyd for his use of Xylocaine then make sure you do it to every fighter that has used Xylocaine.