Manning has scored
16
17
0
41
49
18
23
24
17
20
16
35
Points in his first playoff games and, again he's had a top 10 scoring defense in 6 of his 12 playoff seasons. In other words, Manning has put up fewer than 20 points in half of the first games in his playoff seasons, and put up more than 24 points only 3 times in those 12 games.
Anyone trying to play the "no defensive support" card in support of Manning is just proving either his ignorance or his knowing willingness to look stupid. In Francessa's case, sadly, I think he's doing it knowingly. I'll hold out for willful ignorance, though, because Francessa's usually better than this.
Edit: By way of comparison.... Brady, despite having played in a deliberately defensive system for the first several years of his career, has scored more than 24 points in 5 of 10 'first' games.