Cowboys running back Marion Barber is listed as probable for Sunday's game in Denver, but that doesn't mean he will assume his normal role in the offense.
Second-year running back Tashard Choice will get the majority of the work at tailback Sunday, according to a source.
Barber made the trip to Denver and is expected to be active for the game, but there's still some uncertainty about how effective he can be with the left quadriceps injury. The Cowboys believe they can lean on Choice, based on how he performed in 2008. He had 62 carries for 325 yards and two touchdowns during a four-game stretch against the Steelers, Giants, Ravens and Eagles to end the season.