The Diggs one in the 4th qtr was very bad. Allen threw a perfect ball and it went right through his hands. That would have been a massive play. The other one was a little tougher but you need to find a way to hold on.
Buffalo was even fortunate enough to have life after they tried a weird fake punt play and then KC got inside the 5 and then fumbled through the endzone the next play. Would have pushed the lead to 10 right there. Allen also tried to fumble the game away and instead of falling on the ball, tried to play hero ball and scoop and score. Buffalo retains possession and keeps driving. There was also a ball on that drive that Allen threw where it was very close to being picked and could have been if the KC player didn't make a play to swat it away. Another KC defender sitting right behind him and could have taken it the other way.
So much went Buffalo's way tonight, at home, had several leads, playing against Mahomes worst supporting cast he has had and still could not find a way to win.
In the Brady vs Mahomes comparison, Manning did breakthrough when he finally got the game at home against Brady in the 2006 playoffs. Allen couldn;'t breakthrough when he finallt gets Mahomes at home. This reminds me of Brett Favre at Green Bay not being able to beat Dallas at all.