8. Philadelphia 76ers – 1984
The New Jersey Nets pulled off one of the greatest upsets of all time when they knocked the 76ers out of contention. Philadelphia came into this series as the defending NBA champions. But the Nets overwhelmed them in a shock for the ages.

New Jersey had never won a playoff series before this one. Then they cruised into a two-game lead and left the Sixers with too much work to do. Their away day form was outstanding as they beat the heavy favorites. It was a wasted opportunity for the Sixers (via Sports Illustrated).