Kings general manager Dean Lombardi said the injury was not a head injury but will sideline Doughty for 7-10 days.
On the game's first shift, Doughty was hit hard by Flyers rookie forward Zac Rinaldo while skating through the Philadelphia zone. The hit occurred just 24 seconds into the game, and precipitated a fight between Rinaldo and the Kings' Dustin Penner.
Doughty left the ice under his own power, but played just one more shift totaling 1:10 the remainder of the period. He left the bench during the period.
He entered the game fourth in the League in average ice time per game at 27:33 in three games.
I remember the first time at Wrigley Field all of us had the long johns, the turtlenecks and the extra equipment because we were afraid of being cold. Halfway through the first period everybody's ripping everything off and we just ended up wearing what we would normally wear for a game at the United Center.
— Chicago Blackhawks forward Patrick Sharp on the 2009 Bridgestone NHL Winter Classic