Has any team ever won the Super Bowl after losing to the New York Jets during the regular season?

Answer 1

Yes, through Super Bowl XLIV 9 teams have won the Super Bowl in their first appearance:

1) Green Bay Packers - Super Bowl I (obvious since it was the first ever Super Bowl).

2) New York Jets - Super Bowl III

3) Pittsburgh Steelers - Super Bowl IX.

4) San Francisco 49ers - Super Bowl XVI.

5) Chicago Bears - Super Bowl XX.

6) New York Giants - Super Bowl XXI.

7) Baltimore Ravens - Super Bowl XXXV.

8) Tampa Bay Buccaneers - Super Bowl XXXVII.

9) New Orleans Saints - Super Bowl XLIV

There have been 19 teams that lost the Super Bowl in their first appearance.

Answer 2

Yes, 1 team through the first 45 Super Bowls ... that being the 2001 New England Patriots who lost to the Jets, 10-3, in Week 2 of the regular season and went on to win Super Bowl XXXVI.