Sprint Cup points leader Jeff Gordon cut short his practice because of back spasms and the No. 24 team has Regan Smith on standby should the four-time champion not be able to run the Coca-Cola 600 on Sunday night. Crew chief Alan Gustafson said the team would not run the car in the final practice session and instead will get it ready for Sunday's race. Should the pain be too much, then Smith would take over the Hendrick Motorsports car. More...