Brock Lesnar has always been a monster. He wrestled at Minnesota, which being a Big-10 school is known for being a hard ass wrestling program. Its not like when you hear about C.B. Dolloway being an "All-American" out of Arizona State. Arizona state is barely even a second rate program. Lesnar graduated from Minnesota in 2000, but the Gophers won the NCAA team championships in 2001 and 2002 which means even in 2000 it was a tough program. One of my friends wrestled for Ohio State and was a ridiculously good wrestler, but was manhandled by Lesnar. It was like an adult wrestling a small child. Or, like Tiger Woods playing in the ladies PGA...just not fair. NCAA is heavily regulated for enhancement, and he was a bad-ass then, so even if he got help for his stint in the WWE, genetically he has what it takes to be in the shape he's currently in.
I've never understood the Heath Herring thing. He has always looked lazy and out of shape to me. I think the whole "cowboy" thing just got him some big attention in Japan because they like just about anything stereotypically over the top "American" (they even drink budweiser on purpose for god's sake!)
Herring likes to stand, but he won't be able to stop Lesnar taking him down. If Lesnar has been making some reasonable progress in his training (ie submission defense) then I think Herring may need the Undertaker. Or his creepy little urn carrying sidekick at least. What was that dudes name?