Here's some interesting research.
Teams that went 5-1 or 6-0 straight up in divisional games the season prior this past season were the Saints, Bills, Titans and Packers.
How do those teams perform in September?
As dogs they've been 56-34 ATS, 62.2%, and if we subtract their 13-13 ATS mark as dogs in week one this moves to 43-21 ATS. They have been 32-16 ATS out of division as dogs and 11-5 ATS in division.
As favorites they've only been 123-144 ATS in September about 46%.
season > 2002 and playoffs = 0 and tpS(W@DIV, N=6)>4 and month=9 and AF, AD, HF, HD and week
Teams that won 1 or 0 divisional games last season, how do they do in September?.....Jets, Lions, Falcons, Broncos, Jaguars, Bengals.
As:
Divisional home dogs.......25-14 ATS
non-divisional home dogs.......20-31 ATS, including 5-9 ATS week 1....Lions, Bengals
non-divisional away dogs........51-37 ATS......15-14 ATS week 1....Jets
divisional away dogs......34-25 ATS
divisional away favorites.....0-5 ATS....Jaguars
non-divisional away favorites.....11-7, 8-3 ATS first two weeks....Broncos