The Spurs are one of four former American Basketball Association (ABA) teams to remain intact in the NBA after the 1976 ABA–NBA merger and are the only former ABA team to have won an NBA championship. The franchise has won NBA championships in 1999, 2003, 2005, 2007, and 2014. As of the 2019–20 season, the Spurs had the highest winning percentage among active NBA franchises