Dallas Cowboys star guard Zack Martin is doubtful for Sunday’s game against the Washington Commanders due to ankle and shoulder injuries.Martin didn’t practice at all this week. He also physically struggled during Monday night’s loss to the Houston Texas.Martin, who turned 34 on Wednesday, has started all 162 games played in 11 seasons with the Cowboys. He’s a nine-time Pro Bowl selection and a seven-time first-team All-Pro.Tight end Jake Ferguson (concussion) and safety Markquese Bell (shoulder) have been ruled out. Neither player practiced this week after being hurt against the Texans.Cornerback DaRon Bland (foot) practiced in full this week and will make his season debut. He was injured in August.