Not sure how you're calculating his Saints/Payton numbers. I think the only thing that should count is the 6 full games he played in 2021, as he got injured halfway through the 7th game
When I do this I get totals of
| Comp % | Att | Comp | Yards | TD | INT |
| Saints/Payton | 58.9 | 151 | 89 | 1114 | 13 | 3 |
Which gives averages of
| Comp % | Att | Comp | Yards | TD | INT |
| Saints/Payton | 58.9 | 25.1 | 14.8 | 185.6 | 2.2 | 0.5 |
Which projects on a 16 game season to ~3000 yards and 34 TDs (with 16 INTs)
His passer rating was over 100 meaning he was very efficient.
It might have been the season like Roehtlisberger had in 2007, where he only tossed for 3200 yards, but had 32 TDs to 11 INTs