Rosen was removed to begin the fourth quarter, with Ryan Fitzpatrick replacing him. The veteran led Miami on a pair of touchdown drives, giving the Dolphins a chance to win their first game this season. The club ultimately failed to convert a potential go-ahead two-point try with six seconds left.
"Josh will continue to be the starter," Flores told reporters. "If we feel like we need a spark and Fitz has to go in, we'll continue to do that."
Dolphins QBs vs. Redskins
Rosen was making his third straight start after beginning the season on the bench as Fitzpatrick's backup.
The Dolphins sunk to 0-5 following a 17-16 loss to the Redskins at home.