Most athletic heavyweight boxer?

Wladimir Klitschko has a passion for Golf, although somehow I can't imagine him playing Golf...

 

None of the above.

Ken Norton. Never played a sport he wasn't great at. Such a standout track star in high school they had to change the rules to prevent him from being a one-man track team. Ran track, played varsity football and basketball. Received a bunch of college scholarship offers for Track and Football. The NFL was interested in him.

I don't think this is even a question.

... and according to Norton, he was kind of lazy, rarely gave any sort of training his all.