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Marcio Jose Sanchez, Associated Press
Denver Broncos defensive end Elvis Dumervil, right, sacks Oakland Raiders quarterback Carson Palmer (3) in the fourth quarter of an NFL football game in Oakland, Calif., Sunday, Nov. 6, 2011.

ENGLEWOOD, Colo. — The Denver Broncos are in contention at the halfway point of the season thanks to a middling AFC West and a return to health.

In their 38-24 win at Oakland on Sunday, the Broncos got key contributions from four players who had been sidelined for a combined nine games earlier this season: Eddie Royal, Willis McGahee, Elvis Dumervil and Champ Bailey.

Royal, who missed three games with a strained groin, caught his first touchdown pass of the year and returned his first punt 85 yards for another score.

McGahee returned from a one-week absence and ran for 163 yards and two TDs less than 10 days after undergoing surgery on his broken right hand.

Dumervil picked up his first sacks since 2009 and Bailey picked off his first two passes.