It's hockey jargon; the most common penalty for fighting (on ice) is five minutes in the penalty box.
Domi and Alfredsson get caught by the referee cuffing each other against the boards; the ref blows his whistle and calls, "Five for fighting!"
An amazing singer's, John Ondrasik's, stage name. Some of his most popular songs are "Superman (It's Not Easy)", "100 Years", "Chances", "If God Made You" and "The Riddle". Five For Fighting writes and sings very emotional songs, making a strong connection with his audience :)
Five For Fighting's songs are great. I love "Superman" and "100 Years" the most!