Also, you're comparing apples and oranges. Body builders are trying to build a perfect physique...boxers are less concerned about their body appearance, more concerned over performance (just look at George Foreman's fights at the end of his career...chunky, but still a good boxer).
I tend to limit my yolk consumption just to avoid excess cholesterol. I'll take 5-6 eggs, but only keep 2 yolks...the rest are whites. This is about 20-25g of protein, and you get all the amino's with less fat.