I don't even care what their regular season stats are, Belichick defenses have routinely gotten trounced in the playoffs, often by crappy QBs. Going back to 2010:
Sanchez - 3 TD/0 INT, 127.3 rating
Tebow - 0/0, 52.7
Flacco - 2/1, 95.4
Manning - 1/0, 103.7
Schaub - 2/1, 90.6
Flacco - 3/0, 106.2
Luck - 2/4, 53.0
Manning - 2/0, 118.4
Flacco - 4/2, 92.1
Luck - 0/2, 23.0
Wilson - 2/1, 110.6
Smith - 1/0, 77.6
Manning - 2/0, 90.1
24 TD's to 11 INT's (take Andrew Suck out and it's 22/5). Nine of thirteen finish with 90+ rating, five over 100. Even noodle arm 2015 Manning got over 90. Seven didn't throw a pick.
These aren't exactly a murderer's row of QBs, either. When Brady has a bad postseason game, we always hear that it's because the defenses are better.
Not in the Patriots case. Most of these turds play better than normal against NE.