In honor of LeBron James' 39th birthday, re-live the Cavaliers' championship run from the first day of training through their historic comeback at the 2016 NBA Finals. This is the amazing, first-hand story of the 2015-16 Cleveland Cavaliers and an unforgettable season to believe, with LeBron James, Kyrie Irving, and Kevin Love. Subscribe to the NBA: https://on.nba.com/2JX5gSN