Josh Brown had field goals of 34 yards in the second quarter and 38 in the fourth.
The way the Giants’ defense was playing, that’s all New York needed.
Washington got field goals of 31 and 49 yards from Kai Forbath, both after Giants turnovers.
The Redskins finished with 251 total yards after converting on 5 of 20 third-down attempts. Kirk Cousins, who started third straight game since RGIII was shut down, was 19 of 49 for 169 yards with two interceptions.
The game might have been the last for Redskins linebacker London Fletcher, who said he is 99 percent sure his 16-year career will end this season. He played in all 256 games in his career, starting the last 215, an NFL record for linebackers.