Russell, the top pick in April's draft, completed 4-of-7 passes for 56 yards and rushed for four yards on three carries for the Raiders (4-8), who have won two straight, while Justin Fargas ran for 146 yards and a touchdown.
Denver running back Travis Henry ran for 49 yards with a pair of touchdowns in his first game back since tearing a posterior cruciate ligament.
Jay Cutler managed just 16-of-32 passing for 214 yards and two interceptions for the Broncos (5-7), who have lost two straight.
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