To give you an idea , Jerome LeBanner was fighting at 270 lbs against Aerts (in their 2005 fight) Compare the two...Lesnar seems to have a larger back...but his legs are skinny compared to lebanner's.. [yt]JVma4LzkxO8[/yt]
Thats a good point, Mir commented on that in the post-fight interview. He said he went for the armbar a couple of times and missed it, then went for the leg lock where 'he was thinner', or something like that.