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Genevieve Ross, Associated Press
Minnesota Vikings' Christian Ponder (7) throws with Denver Broncos' Robert Ayers applying pressure during the first half of an NFL football game Sunday, Dec. 4, 2011, in Minneapolis.

EDEN PRAIRIE, Minn. — Minnesota Vikings running back Adrian Peterson has returned to practice.

Peterson took part in individual drills Thursday. He has missed the last two games because of a sprained left ankle, but coach Leslie Frazier said this week that Peterson was getting "very close" to coming back.

The Vikings play at Detroit on Sunday.

Quarterback Christian Ponder has not yet been on the field this week after sustaining a right hip pointer in last Sunday's game. Offensive coordinator Bill Musgrave says Ponder is still stiff and that the rookie "didn't look too good" walking around.