From left to right, Matt Kenseth (20), Brian Scott (2) and Brad Keselowski (22) lead the pack of racers at the start of a NASCAR Nationwide auto race Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
Kyle Busch waits out a rain delay at his team stall on pit road during a NASCAR Nationwide auto race Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
Kyle Busch leads a group of drivers through the first turn during a NASCAR Nationwide auto race Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
A spectator walks around a puddle caused by overnight rains, prior to a NASCAR Nationwide auto race Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)
Dale Earnhardt, Jr., smiles as he stands talking with crew members in the garage during NASCAR Sprint Cup auto racing practice Saturday, March 1, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)