Here's a (completely subjective) ranking of every championship team since the ABA/ NBA merger, from on -- and be prepared to see the. The National Basketball Association (NBA) Finals is the championship series for the NBA and The Boston Celtics won the trophy 14 times, the most in league history. From to , they won the NBA Finals 11 out of 13 times, including Miami Heat · –07 Cleveland Cavaliers · Golden State Warriors · Utah Jazz. View the complete list of NBA Finals Champions from the beginning of the finals in Year. Champion. Results. Opponent. , Golden State Warriors.