Englewood, CO -- (Sports Network) - Broncos starting guard Ben Hamilton is doubtful for Sunday's game against the Cowboys with a hamstring injury.

Hamilton has started all three games this season and has been on the Broncos' offensive line in every game since 2002 -- save for the 2007 season, when he was placed on IR with post-concussion symptoms.

The 32-year-old Minnesota product did not participate in practice all week.

Starting offensive tackle Ryan Harris is questionable with a shoulder injury after starting the last 19 regular season games for Denver. He was limited in practice the last two days.

Also questionable is wide receiver Brandon Stokley, who did not play last week due to a thigh injury. He was limited in practice all week and has six catches for 157 yards and a touchdown this season.