Cavs are first to come back from 3 - 1 deficit in the series to win the NBA Championship ; .
They end a 52 year drought for Cavs , who have had no major league sports champions since the 1964 Browns .
Cavs are first to come back from 3 - 1 deficit in the series to win the NBA Championship ; and they end a 52 year drought for Cleveland , who have had no major league sports champions since the 1964 Browns .