Renan Barao
Former UFC bantamweight champion Renan Barao used to cut 30-40 pounds of weight before fights. It got so bad before his scheduled rematch with TJ Dillashaw that Barao passed out from dehydration.
Since the IV ban came in, Barao has decided to compete at featherweight.
Johny Hendricks
Former UFC welterweight champion Johny Hendricks famously missed weight for his title fight against Robbie Lawler. He cuts absurd amounts of weight in excess of 30 pounds to make the lean figure you see on weigh ins night.
Here he is out of season:
and the craziest weight cut of a time is…