The Ducks ended the Kings' streak, but the two points in the playoff race might have come at a high price.
Ryan Getzlaf, the team's leading scorer, sprained his left ankle during the second period and left the arena wearing a boot and on crutches. X-rays were negative, but an MRI exam is scheduled for Tuesday.
"That will give us a better indication of the severity of the sprain," Coach Randy Carlyle said.
The Ducks have three games remaining before the Olympic break, when Getzlaf is scheduled to play for Canada in Vancouver.
Canada's first game is Feb. 16, eight days after his injury.
"Hopefully, he won't be out too long," Ducks captain Scott Niedermayer said. "I don't have to say what he means to this team, what he does for us. So hopefully it's not bad."
Niedermayer, also captain of Team Canada, said he hadn't considered the potential impact on the Olympic team.
"I know he would love to play and wants to play, and we don't really know how badly hurt he is right now. Hopefully he's in our lineup in two nights. That would be good."