Gano exited Sunday's game at Washington due to a hamstring injury, Dan Salomone of the Giants' official site reports.
The Giants tacked Gano on to their Week 2 injury report Saturday with a groin injury, but he didn't have a designation ahead of this contest. He proceeded to suffer a new health concern during Sunday's opening kickoff, when he remained on the turf in serious pain. It's unclear who, if anyone, may handle placekicking duties for New York moving forward, but the team has deemed Gano doubtful to return.