Roy Nelson is one of the most popular fighters in the UFC today.
The Ultimate Fighter Heavyweights winner is well-liked for his ability to take a punch, personality and exciting knockout finishes.
But while he is well-liked, he has also been criticized by fans and Dana White alike for his weight.
Nelson may never have a body like Brock Lesnar or Alistair Overeem, but he could always lose 10 or 15 pounds.
Here's a look at some fad diets that could help him.