AP
NEWTON, Iowa (AP) Rookie William Byron grabbed the lead with just over 20 laps and won the NASCAR Xfinity race at Iowa Speedway on Saturday night for first series victory.
A seven-time winner last year in the Truck Series, Byron, broke through just a week after an agonizingly close loss to Denny Hamlin at Michigan.
Ryan Sieg was second in the stand-alone race with no Monster Energy Cup regulars in the field.
Tyler Reddick was third, followed by Ross Chastain and Dakoda Armstrong.
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Christopher Bell led 151 laps in just his second career start in the series before a late wreck cost relegated him to 16th. He led a race-high 99 laps in the Truck race Friday night.
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