Callahan left the ice cradling his left arm after he became tangled with the Flyers' Maxime Talbot in a post-whistle scrum. Both parties dropped their gloves, but Callahan grimaced in pain and never threw a punch before tumbling to the ice.
Earlier in the game, Callahan scored his second goal of the season, which turned out to be the game-winner as the Rangers edged the Flyers 2-1.
Rangers coach John Tortorella had no update on Callahan after the game and said he would be re-evaluated Wednesday.
It was a big dream. [Messi] is probably the best athlete out there, so it's a big honor, for [Kuznetzov] as well. It's maybe a once in a lifetime opportunity to meet the best player in soccer right now. I'm a big Barcelona fan and Messi fan, so it's huge. You can take [Michael] Jordan, [Mark] Messier, [Wayne] Gretzky, those kinds of [people]. It's an honor to meet. It's nice to be in that position.
— Washington Capitals forward Alex Ovechkin told told Monumental Network after meeting soccer star Lionel Messi prior to Argentina's practice at Fed Ex Field in Landover, Md. on Friday