http://www.whowins.com/tables/up20.html Home Teams in the finals up 2-0 have won 94% of the time. Home Teams in any series up 2-0 have won 90% of the time. http://www.whowins.com/tables/up21.html Home Teams that are up in the finals 2-1 have won 94% of the time. Any team up in the finals 2-1 have won 85% of the time. Home teams in any series up 2-1 have won 76% of the time. Any team up in any series have won 70% of the time. Those are pretty good odds. Comebacks are obviously harder in the Finals because the teams are more likely to be evenly matched, and even a one game advantage by Game 3 is a huge advantage. Bottom line...Boston has to win 3 out of 4 to win.