Because white folks actually have a job?
For whatever reason, be it natural selection due to slavery or coming from a background where their ancestors live in a harsh environment, Blacks seem to be disproportionately superior in any sport they choose to participate in that require strength and physical agility. Not ALL Blacks, it's never all, but they are disproportionately represented. In America they are about 12% of the population but look at football, boxing and especially basketball, sports which are valued in their culture (and American culture). I think they are about 8% in baseball but they don't seem as interested in that sport as the others. This is not racism anymore than saying Jews and Asians are disproportionately smart and successful. It should be taken as a compliment to be thought of as naturally physically superior. At least that's what Al Campanis (sp) and Jimmy the Greek thought.
As far as their disproportional high rate of crime this is a separate issue having more to due with their culture rather than genetics. They can stay angry and blame the Man for keeping them down and forcing them into a life of crime but every single minority group that came to this country were also "kept down" and discriminated against. They stuck together in their little Irish, Jewish, Italian and China towns and slowly built up economic power and success. Blacks are too busy fighting amongst each other and everybody else waiting for someone to give them something.
Reparations. Black president. Yeah, that will solve things.