LeBron James was, without question, the best player in the 2015 NBA Finals. The then-30-year-old' King James' averaged an incredible 35.8 points, 13.3 rebounds, 8.8 assists and 1.3 steals while playing 45.7 minutes per game. However, James' effort was not enough to give his Cleveland Cavaliers their first NBA title, as they lost 2-4 to the Golden State Warriors.