The Rangers were assessed eight penalties, which coach David Quinn said was the difference in the game.
"We shot ourselves in the foot with the penalties," Quinn said. "Two of them go over the glass, two too many men on the ice penalties, obviously one late in the game. ... You just can't take penalties like that."
Giroux last played Feb. 7. He missed two games and came off the protocol list Tuesday. He said he had a few days of bad health, but the Philadelphia captain practiced Tuesday, and after the morning skate Wednesday said he felt well enough to play.
"I didn't feel that great, but when you come back from a long time like that you try to keep your shifts short, keep it simple," Giroux said. "You don't want to get caught out there, so it turned out good tonight."