Hockey is a Human sport played by two teams in heavy protective gear on ice skates, trying to get a puck into one of two goals on a field of ice using a stick. Like some other sports, each player wears a number on their jersey.
In 2376, B'Elanna Torres gave Tom Paris a television set, and one of the first things he watched on it was an old hockey game. While watching it, Torres tried to tell him about the recent events, but realized that he wasn't paying attention, and that getting him a TV may have been a mistake. (VOY: "Memorial")
In 2377, Paris and Kim played the program. The Nausicaan goalie for the other team was very good, and aggressive, and the two left the program with many bruises on their faces. They were worried that The Doctor was going to yell at them again, as they often got bruised up when playing hockey and other sports on the holodeck. (VOY: "Critical Care")