When it comes to betting on sports events, official betting is a way for bettors to place wagers based on the actual odds and totalizators offered by regulated operators. Odds are calculated based on the amount of money wagered on an outcome, and they change as the action gets more popular or less popular. Official betting is a common practice in the United States, and it can be found at many online sportsbooks.

Several states legalized sports betting after the Supreme Court struck down PASPA. Some, such as New York and Florida, are allowing retail sportsbooks to open, while others have launched online and mobile sportsbooks. Still, some states, including Arizona and Tennessee, have yet to launch their sportsbooks.

In Colorado, sports betting is available for in-person and online bettors. As of May 1, 2020, multiple operators allowed residents to create accounts and make bets on the results of professional sports events. However, there are some restrictions involving in-state college games. Bets on game outcomes are allowed, but player prop bets in collegiate games are prohibited.

The NBA has partnered with DraftKings and FanDuel to support responsible gambling efforts, including education via social media messaging and public service announcements. It also enforces strict standards and limitations on betting-related advertising across NBA and partner platforms. The league has also established an integrity unit to monitor suspicious activity. But some players have violated the league’s gambling policy, with Isaiah Rodgers and Rashod Berry of the Colts and Alabama baseball coach Brad Bohannon fired over their betting behavior.