Getzlaf, listed as day-to-day, leads the Ducks in scoring, and is sixth in the NHL, with 52 points (16 goals) in 50 games. He missed one game this season prior to Thursday.
"It's a lower-body injury," Ducks coach Bruce Boudreau said. "That's all I'm saying right now. It's day-to-day, and we'll probably know more before we hit Tampa [Bay on Feb. 8] anyway. I don't even know if he can play [Friday against the Washington Capitals], but he's coming to Washington with us."