Yet, you chimed in and brought up Dan Marino, didn't you? All to discredit Dak, am I right? As for those playoff wins and SB appearance, that is more a team accomplishment than an individual accomplishment. Since you also just now brought up 6 of Marino's playoff games were where he threw for a 90+ passer rating, well, I can do the same thing for Dak:
Dak Prescott has a passer rating of 92.3 with 1,559 yards, 11 touchdowns and 5 interceptions in 6 games in the playoffs in his career.
Out of those 6 playoff games, Dak has thrown for a 90+ passer rating in 3. That's 50% amount of playoff games where Dak has thrown for a passer rate of 90 or above.
Now, let's compare Dan Marino. Marino has had a passer rate of 90 or above in 6 out of 18 career playoff games he played in. That's 30% amount of playoff games where Dan Marino threw for a passer rate of 90 or above.
So, as one can see, Dak Prescott has by far the better % amount of times he has thrown for a 90+ passer rating than Dan Marino. That proves more than just nothing as you stated. Thank you for bringing up Dan Marino. Following the playoff percentages, I would rather take my chances with Dak. So should you since you love to bring up stats, unless it doesn't fit your agenda.