Dallas Cowboys coach Mike McCarthy said Friday he still hasn’t decided who will start at quarterback in Sunday’s game against the unbeaten Pittsburgh Steelers.Garrett Gilbert has taken the majority of the first-team snaps in practice this week over Cooper Rush, Sports Illustrated reported.”Obviously, Garrett has a little more current experience than Cooper because he’s been here (longer),” McCarthy told reporters Friday. “We’re just working through all that. But my goal is just to make sure both guys are ready for Sunday.”When the Cowboys (2-6) host the Steelers (7-0) on Sunday in Arlington, Texas, either Gilbert or Rush will become the team’s fourth starting quarterback in the last five weeks.Dak Prescott sustained a season-ending ankle injury in Week 5. Andy Dalton suffered a concussion in Week 7 and tested positive for COVID-19 this week. Rookie Ben DiNucci started Sunday night’s 23-9 loss in Philadelphia and struggled, completing 21 of 40 passes for 180 yards with four sacks and two lost fumbles.