As a whole, blacks are superior to whites when it comes to athleticism and whites are superior to blacks when it comes to intelligence.

Liberals call this racism but everyone else on the planet knows its 100% true.

Coaching requires intelligence and not athleticism, hence there are far fewer black coaches then whites and the black coaches significantly underperform their white counterparts.

San Francisco is well known for being one of the most liberal cities anywhere in the country and their political correctness bit them in the ass. The SF 49ers decided to hire Mike Singletary as their head coach in order to show more political correctness and the 49ers floundered under his management. They finally realized (what everyone else already knew) Singletary didn't have the intelligence necessary to coach in the NFL (or even at the college level) and replaced him with Jim Harbaugh and the 49ers completely turned things around making it to the NFC championship game.

The position of Quarterback requires both athleticism and intelligence which is why there are very few black QB's as compared to whites.

BigBear talks about Michael Vick and Cam Newton but neither of them will ever win a SuperBowl:
We all know that Michael Vick is a once-in-a-generation talent. Let’s just put that argument to bed. His playoff stats aren’t so impressive, however. In six career playoff games, Vick has completed just 54.2 percent of his passes, with five TDs and three INTs. Even worse, he has never done better than a 79.9 passer rating in any playoff game he has started. Those are pedestrian numbers at best.

To cap it off, he has appeared in exactly zero Super Bowls.