Photos: NASCAR at Phoenix, Saturday, March 18, 2017

AVONDALE, AZ - MARCH 18: William Byron , driver of the #9 Axalta/Ameristar Chevrolet, and Erik Jones, driver of the #20 Reser's Main St Bistro Toyota, take the green flag to start the NASCAR XFINITY Series DC Solar 200 at Phoenix International Raceway on March 18, 2017 in Avondale, Arizona. (Photo by Chris Trotman/Getty Images)