Tommy Burns vs Gerald Mcclellan Burns the tiny heavyweight champ against Mcclellan a very big middle a 12 round fight
We don't have the footage of Burns or enough tests of McClellan to be sure on any outcome. McClellan naturally weighed around 180lbs and supposedly beat up Tony Tucker a few times in sparring so he certainly has the frame and power to compete at the weight
Tough call. Gerald might be able to get it done, but Burns might prove too tough in the end. A lot would depend on the rule set.