Black players predominate in football because they completely dominate the speed positions. Ignore the dimwitted loon up at the blackboard writing, “race is a social construct; there are no performance differentials attributable to race.” The loon is a liberal, and should be committed. In the real world, everyone recognizes that racial differences yield important differentials with regard to athletic performance. Some of these favor white and Asian athletes in various sports. But athletes of West African heritage dominate speed events in every country that has a significant black population. When the African diaspora finally reaches China, the Chinese sprinters will be black as well. And when it comes to football, the majority of the positions on the field are speed positions.
I remember about 10-20 years ago listening to sports news on the radio, and the announcers reporting that Canada had just won a gold medal in the sprint relays at the Olympics. At first I marveled at the fact that a small, virtually all-white country like Canada could produce four white guys fast enough to win a gold medal in the sprints at the Olympics.
Then the light bulb went on in my brain...the sprinters had to black. Sure enough...as it turned out every Canadian sprinter medalist was black.
In soccer too, watch any Premier League soccer game now, full of black players, from Africa.