McCoy (lower leg) has been ruled out for Sunday's regular-season opener against the Eagles, John Keim of ESPN.com reports.
McCoy remains without a clear timetable to return to action. The veteran signal-caller is still working to strengthen his right leg, which continues to cause him issues when attempting to plant. With McCoy sidelined, rookie quarterback Dwayne Haskins will slot in as the top backup behind Case Keenum to begin the season.