re: How does Florida produce all these elite DB's?

At the risk of being called a racist, etc, I had a SE historian (who was an African American) explain this very question about the distribution/size of African American athletes. African Americans during the slave trading years were literally breed to perform certain jobs. In Florida, much of GA, much of south AL, and the delta area of the MS and LA, plantations needed a smaller, quicker worker to work their crops. Areas that bought slaves for more difficult, labor intensive tasks bought big, strong men. That's why the timber areas of Alabama, Georgia, and Mississippi produce huge, fast African American athletes. Of course there are always exceptions, and families move over time, but that's how it was explained to me in general.