O
Off the Board Horse Racing
A game or event that is sportsbooks will not allow you to bet on. Often times a game is taken off the board if there is uncertainty surrounding a player’s injury status or the weather. (OTB)
Off-Track
Betting conducted away from the track.
Opening Line
The initial point spread or money line offered by the sportsbook to bettors.
Outsider
A horse with little chance of winning.
Overtime
Extension to a tied contest at the end of regulation play that lasts until a winner is determined or maximum overtime periods expire. When a game is tied at the end of regulation and they play extra time to determine a winner. (OT)
Over/Under
Also known as the total, this refers to the total amounts of points/goals/runs that will be scored in the game. If both teams combine to score more than the total, the over wins. If they combine to score less, the under wins.
