Peterson delivers on promise to be more vocal

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Minnesota Vikings running back Adrian Peterson (28) carries the ball during the second half of an NFL football game against the Arizona Cardinals, Sunday, Oct. 9, 2011, in Minneapolis. (AP Photo/Genevieve Ross)

EDEN PRAIRIE, Minn. (AP) — Adrian Peterson has largely let his play do the talking for him during his first four seasons in the league.

With his Minnesota Vikings off to an 0-4 start, something had to change. Peterson promised to be a more vocal leader in an effort to get the team turned around, and he delivered on that in a 34-10 victory over Arizona on Sunday.

Peterson didn't just rush for 122 yards and three touchdowns. He delivered a couple of pep talks to his offense in the second half to make sure they didn't give another big lead away.

Coach Leslie Frazier says seeing his highest profile player stepping to the forefront in difficult times is invaluable to a team that is struggling to get on track.

The Vikings travel to Chicago this week.