9. Conor McGregor
There’s a reason that Conor McGregor prefers to fight at lightweight, even though you could argue he was most successful in the 145lb division. He cruised through the featherweight ranks but it came at a cost for ‘The Notorious’ as you can see from his weigh-ins.
McGregor is a big build of a guy and it was almost terrifying to see him on weigh-in day with sunken cheeks like a crack head. His weigh-in for UFC Fight Night Boston was probably the worst though. Just check out this image from an interview straight after. He looked like a different person.
