Crew chief Chad Knaus talks with driver Jimmie Johnson during NASCAR Sprint Cup auto racing practice on Friday, March 7, 2014, in Las Vegas. (AP Photo/Isaac Brekken)
Kurt Busch stands by himself in the garage during NASCAR Sprint Cup auto racing practice Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
A spectator looks around as storm clouds move in for a rain-shortened NASCAR Nationwide auto race on Saturday, March 1, 2014, in Avondale, Ariz. Kyle Busch was declared the winner. (AP Photo/Ross D. Franklin)
Kyle Busch, right, passes Brad Keselowkski, left, going into the first turn during a NASCAR Nationwide auto race Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
Kyle Busch poses for photographers with the winner's trophy after his victory in a rain-shortened NASCAR Nationwide auto race on Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
Kyle Busch poses for photographers with the winner's trophy after his victory in a rain-shortened NASCAR Nationwide auto race on Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
Kyle Busch poses for photographers with the winner's trophy after his victory in a rain-shortened NASCAR Nationwide auto race on Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
NASCAR officials and pit crew members huddle under umbrellas as the car driven by Kyle Larson is covered in the background during a temporary suspension of a NASCAR Nationwide auto race due to rain on Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
During a suspension of a NASCAR Nationwide auto race due to rain, trucks try to blow off the wet track as they pass covered race cars along pit road on Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)