Uh...ever heard of cutting weight?
Just because the scale reports 170 lbs doesn't mean that you walk at that weight. GSP is actually closer to 200 lbs than 170 naturally.
I think Thiago Silva will present unusual problems for GSP because he's, in my opinion, more talented and yet just as strong.
The Pitbull WILL **** Rush...mark my words.
First, you need to get his next opponents name right.
Second, you are so clueless it's not even worth debating you on this topic.