At 2:48 of the third period in the Panthers/Flyers game, Jay Rosehill was assessed two separate minor penalties for roughing and a 10-minute misconduct. According to Rule 19, Example 7, the Flyers had the choice to play one player short-handed for four minutes or two players short for two minutes. The Flyers chose to play one player short for four minutes.
"Team A Captain's choice to play one player short-handed for four minutes or two players short-handed for two minutes. Should he choose the latter, an additional team A player must be placed on the penalty bench to serve the minor penalty for A3". See Table 17 (below) for further clarification.
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