Athletically they are superior (higher natural testosterone levels). And if you look at the number of blacks playing professional sports compared to the number of blacks in the States compared to other races, then you can't really deny it. They make up like 13% of America's population but 70-75% of all football and basketball players.

But if you want to go the PC route and say blacks and whites are exactly the same athletically... you're still losing a ton of competition by not letting them play.