The San Antonio Spurs are an American professional basketball team based in San Antonio, Texas. The Spurs compete in the National Basketball Association as a member of the league's Western Conference Southwest Division. The team plays its home games at the AT&T Center in San Antonio. The Spurs are one of four former American Basketball Association teams to remain intact in the NBA after the 1976 ABA–NBA merger and the only former ABA team to have won an NBA championship. The Spurs' five NBA championships are the fourth most in history behind only the Boston Celtics, Los Angeles Lakers, Chicago Bulls, and Golden State Warriors. The Spurs currently rank first among active franchises for the highest winning percentage in NBA history, and have a winning head-to-head regular season record against every active NBA franchise. In their 40 NBA seasons since 1976–77, the Spurs have won 22 division titles. They have made the playoffs in 27 of the last 28 seasons and have only missed the playoffs four times since entering the NBA; they have not missed the playoffs in the 20 seasons since Tim Duncan was drafted by the Spurs in 1997.