<P> The following is a listing of all 30 current National Basketball Association (NBA) teams ranked by win - loss record percentage, accurate as of the end of the 2017--18 NBA season . The records include wins and losses recorded by a team's playing time in the Basketball Association of America (BAA). Defunct BAA / NBA franchises are also listed, provided they played at least one season, beginning with the 1949--50 NBA season, which was the first season following the merger between the BAA and the National Basketball League (NBL). Additionally, the records do not count wins and losses recorded by a team's playing time in the American Basketball Association (ABA), despite the 1976 NBA - ABA merger . </P> <P> The San Antonio Spurs have the highest win - loss record percentage, with . 622 . The Minnesota Timberwolves have the lowest win - loss record percentage, with . 397 . The Boston Celtics have recorded the most wins, with 3,329, while the Sacramento Kings have recorded the most losses at 3,010 . The Boston Celtics lead the association with the most played games, with 5,642 . Conversely, the Pelicans have played the least overall games, with 1,296 . </P> <Table> <Tr> <Td> Best win - loss record in division </Td> </Tr> </Table>

Who is the winningest team in nba history
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