The last time the Patriots were such heavy underdogs? Super Bowl XXXVI against the Rams in 2002.
Super Bowl XXXVI - Wikipedia
Marshall Faulk says Rams were "cheated out of the Super Bowl" in 2002 - CBS News
Super Bowl XXXVI: The game that launched the Patriots' dynasty - The Washington Post
New England Patriots v Los Angeles Rams: A look back at the Super Bowl 2002 victory that launched Tom Brady's era of dominance
Super Bowl XXXVI: Rams vs. Patriots highlights - YouTube
Revisiting Tom Brady's First Super Bowl Win in 2002
ESPN.com: Page 2 : Now I can die in peace
Revisiting Tom Brady's First Super Bowl Win in 2002
Patriots shock NFL, defeat Rams to win Super Bowl - The Boston Globe
February 3, 2002 • Missouri Life Magazine
Separating fact from fiction on 'Spygate' and Super Bowl XXXVI
Super Bowl XXXVI: Underdog Patriots beat Rams on Vinatieri's last-second field goal – Orange County Register
Official website of the New England Patriots
In 2002, the Patriots were a Cinderella team. Then they won Super Bowl XXXVI, and a dynasty began | CNN
Official website of the New England Patriots
New England Patriots cornerback Otis Smith (45) takes down St. Louis Rams wide receiver Torry Holt (88) during third-quarter play of Super Bowl XXXVI at the Louisiana Superdome Sunday, Feb. 3, 2002
In 2002, the Patriots were a Cinderella team. Then they won Super Bowl XXXVI, and a dynasty began | CNN
The Patriots' latest Super Bowl challenger is the Rams, in a 2002 Super Bowl rematch | FOX 5 San Diego & KUSI News
Remembering The Day Tom Brady, Patriots Beat The Rams For First Super Bowl | ThePostGame.com
In 2002, the Patriots were a Cinderella team. Then they won Super Bowl XXXVI, and a dynasty began | CNN
Super Bowl: Rams vs. Patriots rings a bell for Kurt Warner