Byron wins second Xfinity race.

William Byron DAYTONA BEACH, FLA.» raced to his second straight NASCAR Xfinity Series victory by avoiding several crashes and outlasting the rain at Daytona International Speedway.

The 19-year-old became the youngest series winner at Daytona. He drove his JR Motorsports Chevrolet to his first career win last weekend at Iowa.

Rain postponed the race from Friday night until Saturday, and then a second weather delay of nearly two hours made for a lengthy 250 miles. Then Byron needed overtime to complete the win.