Well pope your argument's main hole is that there is a disproportionate amount of black athletes vs white athletes. The white athletes, while probably having similar body comp to other elite black athletes, are vastly outnumbered in pretty much anything where speed is the primary focus. Skill positions in fb, basketball, sprints/hurdles/quite a bit of jumps in track, etc. are dominated by black athletes. Even if you want to say there are a few good white jumpers, look at the numbers. How many people of west african descent are top 20 in the world, how many white people, how many asian people?