When Anderson Silva fought up in weight, he absolutely destroyed his competition. 2 pretty decent 205'lbers in Irvin and Griffin. He clowned them easier than any fight he's had at 185.
BJ got destroyed in his last fight with GSP at 170 regardless of "greasing" and "juice" allegations on BJ's camps' part.
BJ is great but he's a baby. He has made more excuses for GSP beating him than anyone can stomach. I lost total respect for him over all of his crying about getting owned by GSP.