Ok, it might be a little bit too soon to make that declaration after just 5 postseason games, but in those 5 games Mahomes has played at an extraordinary level. Just look at the numbers he’s put up.
1474 yards on 8 Y/A, with 13 TDs and 2 INTs. Add on to that 154 rushing yards and 3 more TDs.
If you project that out to a 16-game season, it would be 4717 yards, 42 TDs and 6 INTs, and 493 rushing yards with 10 TDs on the ground. That would put him at 5210 yards and 52 TDs combined, a season that would be one of the best ever.
To have this level of play in the playoffs is incredible. There are no cupcake teams to pad his stats against. He hasn’t even gotten the opportunity to go against relatively weaker wildcard teams, since he’s never played a wildcard game. In fact, 3 of those 5 games were in the conference championship or Super Bowl. He’s putting up numbers against teams that have proven they belong, and in the process showing them that they actually don’t.