A 16-driver championship field that would be whittled down to create a winner-take-all season finale is among radical changes reportedly being considered by NASCAR. NASCAR chairman Brian France has repeatedly said he wants to place a greater emphasis on winning, and he's never ruled out tinkering with the Chase for the Sprint Cup championship format in an effort to create the ''Game 7 moments'' he covets. The Charlotte Observer first reported Friday night a possible overhaul to the Chase format that France first introduced in 2004 and has made periodic changes to several times since. Once the field is set, The Observer said NASCAR is considering eliminations during the 10-race Chase. More...