Officials
Two referees and two linesmen on the ice calling infractions and handing out penalties plus several off-ice officials including two goal judges, the game timekeeper, the penalty timekeeper, the official scorer, the statistician and the video goal judge.
Offside
A violation which occurs when both skates of an attacking player cross the opponent’s blue line before the puck is passed or carried into the attacking zone; also called when a player passes the puck from his defending zone to a teammate across the red center line (two-line pass); this is one of the most common calls made in a hockey game and results in a face-off.
On-the-fly
Making player changes or substitutions while play is under way.
On the road
When an NHL team plays games away from its home arena.
Open ice
That part of the ice that is free of opponents.
Overtime
An additional period of play used to break a tie; see sudden-death.
Overtime loss
The result for a team that loses a game in overtime that was tied after regulation; this category was created starting with the 1999-2000 season and is worth 1 point in the standings.
