as a wrestler he has a lot of experience sweeping and reversing takedowns.
How so? When wrestlers actually get taken down, they don't seem to sweep so much as turn on to their stomachs. Sweeping isn't really a wrestling thing so much as BJJ thing.
But regardless, the types of takedowns that Brock has most experience defending is, again, leg takedowns. Randy does things a bit differently, of course.
I like the points that people have made concerning Randy's half-guard over his mount, and I agree that he will probably have more success there -- at least for the first couple of rounds.
I'd also like to point out, having watched the Lesnar-Herring fight once more, I don't think that Brock will actually be able to take Randy down. If we look at all of his takedowns up until this point, they've been high shots. He seems to grab his opponents around the body rather than legs. That type of shot -- especially for somebody with Randy's experience -- will be easy to thwart with underhooks, which would bring the fight right into Randy's backyard.
The more I analyze this, the more I see Randy getting the better of Brock in the wrestling dept.