In the NFL most of the team is composed of line men, the requirements for the job is to be a big thug, well maybe not quite but being a thug doesn't hurt. Running backs are mostly black. Quarter backs mostly white.
But anyway I think in sports there is allot more meritocracy then in most other work places. I can counter your example with many great black athletes but what is the point? The fact is if you excel in sport you can succeed regardless of race. For whatever reason blacks in the US are more predisposed to pick athletics as a career and they are over-represented in these jobs.
blacks excel in American sports. End of. Why. Because of the "system". Through propaganda that white males cant compete with them. You have drafts in US sports where the system completely discriminate against whites. THAT is Fact.
Ive mentioned this before, but take the Olympic games. High jump is dominated by Eastern Europeans. But White US males in general honestly believe black men jump higher.
Greg Rutherford won the Olympic Long jump, and can run a 10.4, but white US males honestly beleive they cant compete.
They use to call white US boxers the "great white hope". But boxing is now dominated by, you guessed it Eastern Europeans.
It has got to the point now that in the USA they are trying to find the next great black hope, bu Wladimir sucks all life out of them once they get in the ring with him.
Gennady Golovkin, Lemenchenko, Sergey Kovalaev to name a few will be all time greats in their respected divisions.
When all things are equal, blacks cant compete with whites at sport. Thats not racism, thats just science. And the fact that you say a high percentage go into sports, makes there failure to dominate world sport even more pathetic...