By Chris Rosvoglou It appears Dallas Cowboys quarterback Cooper Rush has earned a new nickname just three weeks into the regular season. On Tuesday afternoon, Cowboys running back Ezekiel Elliott tweeted: “Cooper Clutch.” This tweet from Elliott is bound to go viral, especially since the Cowboys defeated the New York Giants on Monday night. Rush played another efficient game for the Cowboys, completing 21-of-31 passes for 215 yards and a touchdown. He saved his best moments for the fourth quarter, hence why Elliott is referring to him as “Cooper Clutch.” Rush is 3-0 as the Cowboys’ starting qu…