Somehow today while looking up random fighter info, I stumbled upon the record of Ivan Menjivar. In his career Menjivar fought opponents who would, between themselves, go on to fight at 6 different weight classes (125,135,145,155,170 and 185). If you're wondering about the 185, that won't be in the books until GSP takes the cage against Bisping next month. I haven't sunk my teeth into this but I'm thinking that has to be close to a record. Can anyone find a fighter(s) that have done that or more?