Adrian Peterson Injury: Vikings RB missed Wednesday practice, expects to play Sunday

Minnesota Vikings running back Adrian Peterson sat out practice on Wednesday to rest a sprained left ankle but is expected to play on Sunday versus the Arizona Cardinals, according to Judd Zulgad of 1500ESPN.com.

Peterson suffered the injury during a 30-7 win over the Tennessee Titans in Week 5. Despite the injury, Peterson played in the Vikings' 38-26 loss to the Washington Redskins last Sunday, rushing 17 times for 79 yards and catching seven passes for 50 yards.

Peterson has played in all six games this season, carrying 113 times for 499 yards and two touchdowns. Toby Gerhart, Peterson's backup, has carried 29 times for 101 yards this season. Combined, the Vikings' rushing attack ranks eighth in the league, averaging 126.7 yards a game.

The 4-2 Vikings are in second place in the NFC North, behind the 4-1 Chicago Bears. Minnesota hosts Arizona this Sunday. Arizona's rush defense ranks 19th in the league, giving up 113.3 yards a game.