The San Antonio Spurs are an American professional basketball team based in San Antonio, Texas. The Spurs are one of four former American Basketball Association teams (along with the Nets, Pacers, and Nuggets) to remain intact in the NBA after the 1976 ABA-NBA merger and is the only former ABA team to have won an NBA championship. The Spurs have won four NBA championships, more than any NBA franchise except the Boston Celtics, Los Angeles Lakers, and Chicago Bulls. The Spurs' perfect record in NBA Finals series is surpassed only by the Chicago Bulls, who have won six without a loss; the Bulls and Spurs are the only two teams to maintain perfect records through multiple Finals series. As of July 2009, the Spurs rank third among active franchises for the highest winning percentage in NBA history; they have only missed the playoffs 4 times as an NBA franchise.