Sadler had been bothered by a stomach virus but didn't let that stop him from notching his eighth career Nationwide triumph and collecting a $100,000 bonus in the "Dash 4 Cash" competition.
Defending champ Justin Allgaier finished third, followed by Kenny Wallace and Michael Annett.
Sadler lengthened his series lead over rookie teammate Austin Dillon to 11 points with the result. Stenhouse dropped to third, 19 points off the pace.
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