Official betting is a type of sports wagering that takes place at licensed sportsbooks in the US. It is regulated by the states where it occurs and offers a wide range of options, including bets on football, basketball, baseball, hockey and more. Official bets are typically available in-game and offer live odds that change in real time based on the amount of money placed on each outcome.

Bets on the total number of runs scored in a game are also known as over/under bets, and the odds for these types of bets change frequently. The over/under line is a key indicator of how close a game will be, as it is usually based on the average number of runs scored per nine innings.

In baseball, players, umpires and other team and league officials are prohibited from placing bets on any games in which they have a duty to perform. People who violate this rule are permanently banned from the game and will not be admitted to the Hall of Fame. The MLB works closely with regulators, sportsbooks and independent integrity monitors to enforce these rules and to ensure that the sport’s governing bodies have full control over what is being wagered on its games.

Oregon is one of the few states that has a state lottery with an online sportsbook, which offers a variety of bets on major events. However, it does not include some of the more esoteric wagers like a “superfecta” or a “daily double.” The lottery’s sportsbook only accepts bets from residents of the state.