bbush, no! It's not the same type of protein with the same amino acids in the vegan food, it's not as usable, you know. Many people obtain this protein from meet, dairy and stuff. I'm not sure about protein shakes, but I think, they based on whey, which is some sort of dairy.
So yeah. I don't know any sportsman who's totally vegan - no dairy, no eggs, no anything, just pure green food. Oh, except, there was this natural runner, claimed to be vegan or something. Or just vegetarian? But he was pretty good, but still not really popular, nobody keeps track of him and like - maybe he's cheating? Maybe he's even on drugs. Long running is seriously over-the top human body modification.
It was the guy who listened to, pp... Phantogram, the hipster pop group... at least back in 2011, when it was still fresh.