Alabama Kid, Georges Carpentier, Willie Meehan, Len Harvey & Mickey Taylor all fought from the Flyweight to the Heavyweight Divisions. Al McCoy held the Maine state championship in each weight classification, so says Ripley's Believe It or Not!.
Not as crazy as you might think. A lot of these guys started their careers at very young ages, in which case they weren't nearly filled out to what they would become. In the case of a guy like "Fat" Willie Meehan, this eventually boiled over to the other side when he did grow into himself, and then some.
Ah I didn't think about it like that, very true. I was thinking of a fully grown 5 "5 fighter moving his way up!
<pedantic hat on> When did the Flyweight division come into existence? Did it exist when Carpentier and Meehan were fighting at a poundage that we recognise as the Flyweight limit today? Looking at his record, Carpentier was fighting for Welterweight titles in 1911. <pedantic hat off> In recent times, the closest I can think of is Dingaan Thobela who fought from Featherweight to Cruiserweight. :bbb