And that QB in Tampa has a few....
He was mentioned in the original post with players who have 3 or more.
In the other 3 major sports all the players with more than 6 rings either played for the Yankees, Canadians or Celtics with the one outlier being Robert Horry who was lucky enough to win 7 rings with 3 different teams playing for 3 mini dynasties in the Rockets, Lakers and Spurs.
In the NFL 4 players have won 6 rings. 3 were Packers. Forest Gregg, Fuzzy Thurston and Herb Adderly. All 3 won 5 with the Packers. Adderly and Gregg added another ironically with the Cowboys in 71 and Thurston with the Colts in 58 before playing with the Packers.
If Brady can add 1 with Tampa he'll join Richard (11 Montreal), Russell (11 Celtics) and Berra (10 Yankees) as tops in his sport.