UFC champ Chris Weidman 'wouldn't be surprised' if most fighters were 'on something'

Fight Hub spoke to UFC Middelweight champ Chris Weidman about Anderson Silva and a comment that Vitor Belfort made. Here's what Weidman had to say:
Are you tired of talking about Anderson Silva?
No, no. I miss Anderson Silva. I miss him, I miss talking about him, I miss fighting him. So, it's sad.
Vitor Belfot says most fighters are on something.
I got no... I have no facts on that, but I wouldn't be surprised, I'll say that.