The Österreichische Basketball Bundesliga (OBL) (in English: Austrian Basketball League (ABL)) is the top men's professional basketball league in Austria. Until the 2004–05 season, the league was known as the A-Liga (A-League) and then until the 2008–09 season it was called the Österreichische Basketball Bundesliga (OBL). Since the 2008–09 season, it has been named the Admiral Basketball League, after the league's main sponsor, Admiral Sportwetten.
Each team plays the other 11 teams twice, creating a 22-game regular-season schedule. After that, the top eight teams move on, and play another double round robin. The four top teams after that move on to a best-of-five semifinals series, and the two semi-finals winners meet in a best-of-five championship series.
The OBL holds an annual all-star game, pitting a team of the best Austrian players in the league against a team made up of the league's top international players. Like the NBA All-Star Game, the OBL All-Star festivities include a slam dunk contest and a three-point shooting competition.