NASCAR Daytona 500 Auto Racing

William Byron chases an unprecedented third straight Daytona 500 win Sunday when he attempts to make NASCAR history. He'll be trying to win NASCAR's season opener for the third consecutive year in a backup car after he damaged his primary in a qualifying race. He starts near the back in 39th, but he says that does not scare him. Byron has won here with a backup before. He has also won by staying patient and avoiding trouble, not by leading lots of laps. The field also has big storylines. Kyle Busch starts on the pole while stuck in a long winless skid and Brad Keselowski races while recovering from a broken leg.