Adrian Peterson impressed during his preseason debut with Washington on Friday night. He rushed 11 times for 56 yards, ripping off gains of 15 and 13 yards during a 29-17 loss to the Broncos.
Peterson is competing for Washington's starting running back spot against Rob Kelley and second-year pro Samaje Perine, who missed Friday's contest after suffering an ankle injury last week. Kelley tallied 19 yards on eight attempts Friday.
Peterson, a seven-time Pro Bowler, spent the first 10 years of his career with the Minnesota Vikings. He signed a two-year contract with the New Orleans Saints last offseason and appeared in four games prior to being traded to the Arizona Cardinals, with whom he played six games. The Cardinals released Peterson in March.