Quote Originally Posted by Howlin Mad Missy View Post
regardless of whether he is using or not and natural ability aside, as Miles has stated it is highly unusual for any athlete to move up in weight and keep the same speed - if not more so AND increase their power. It just doesn't happen.
Actually in boxing there are several historical examples. Jimmy McLarnin started at 112 and won the 147 crown with a KO1. Sam Langfrod began at 135 and KO'd HOF heavyweights. Mickey Walker began at lightweight and KO'd ranked heavies. George Carpentier fought in every division that existed.

It is rare, not unprecedented.