NASCAR has whittled the Chase for the Cup down to four drivers _ Joe Gibbs Racing teammates Kyle Busch and Carl Edwards, Hendrick Motorsports' Jimmie Johnson and Team Penske's Joey Logano. They will face off Sunday in the championship round at Homestead-Miami Speedway, where the driver who finishes highest among the four in the Ford EcoBoost 400 will take the title.
Here's a look at how the season has gone for each driver, and what it will take for them to win _ or lose _ the championship.
