The NASCAR Nation was deprived of a dramatic race to the Checkered Flag for the Sprint Cup Championship Sunday at Homestead Miami Speedway. But it was treated to Brad Keselowski's legendary run to the 2012 Sprint Cup championship. His championship was helped along when five-time champion Jimmie Johnson retired from the race with mechanical problems. Keselowski won his title after only three years of Sprint Cup racing, a rarity in NASCAR. The Freaks look at the championship moment in Sunday's Ford EcoBoost 400 in South Florida. Listen…