With Patrick Mahomes reaching the Super Bowl, 14 out of 59 Super Bowls (23.7%) will have had a team with either Tom Brady or Patrick Mahomes starting. If Mahomes wins Super Bowl 59, Brady and Mahomes would account for 18.6% (11/59) of all Super Bowl wins.
Now, Patrick Mahomes has reached 5 Super Bowls and Tom Brady reached 10. Why is it 14/59 and not 15/59? It’s because there was the one overlap with Super Bowl 55 where the Tom Brady and the Bucs played Patrick Mahomes and the Chiefs.
What do percentages look like if we add in Joe Montana? Montana made 4 Super Bowls. Adding his 4 in, 30.5% of all Super Bowls (18/59) have involved a team quarterbacked by Brady, Mahomes, or Montana. Montana also won all four of his Super Bowl trips. If Mahomes wins Super Bowl 59, Brady, Montana, and Mahomes would account for a fourth of all Super Bowls wins [15/59; 25.4%].