Actually, the secret to winning at sports betting is just to bet against the black coach. If you've got a white coach and a black coach, the white coach is a lot more likely to cover the spread.
http://forums.eog.com/index.php?threads/dont-forget-to-bet-against-black-coaches.341252/
Haralabob Voulgaris made millions of dollars betting against black coaches in the NBA. But the strategy also works in college football and college basketball to some degree.
It works less in the NFL because NFL teams rely a lot less on the head coach when compared to the NBA, where the coach is basically the 6th man.
There are a few exceptions of course, since there are some good black coaches like Tony Dungee and some bad white coaches like Curt Rambis. But those are easy to filter out.