The film's trailer caused an almighty fuss because of one line where Vince Vaughn's character says "Electric cars are gay. I mean, not homosexual gay, but my-parents-are-chaperoning-the-dance gay". Universal contacted the Gay & Lesbian Alliance Against Defamation (GLAAD) to see how they felt about it; not surprisingly GLAAD were not keen on it. Sure enough, the trailer attracted a lot of criticism for this one line when it was released, even being publicly criticized by Anderson Cooper. Universal were forced to release a new trailer without the offending line. Ron Howard, however, refused to cut the line from the film itself as he felt it was tantamount to censorship.
During shooting in the United Center for the "Shoot the Puck" scene, Kevin James actually made it into the net while practicing for the scene. The extras in the United Center erupted with "Chelsea Dagger" to commemorate his accomplishment.
The Blackhawk jerseys worn by the main characters are those of Jonathan Toews (Nick), Patrick Kane (Ronny), Duncan Keith (Geneva) and Dave Bolland (Beth). All four players were key contributors in the Blackhawks 2010 Stanley Cup victory, which took place at the time of filming.