We’re about to enter a day in which off-field activity is often busier than the already frantic on-field activity, with Black Monday officially beginning in 14 hours.

By now there are several firing formalities that merely need to be announced and confirmed tomorrow, or maybe even later tonight. Andy Reid’s tenure in Philadelphia will end, along with Norv Turner’s reign of mediocrity in San Deigo, and yesterday we also learned that both Pat Shurmur and Tom Heckert will be axed in Cleveland, which is something far less than shocking given the takeover by new ownershup there.

But what of Chan Gailey and Buddy Nix in their cold, often comedic upstate New York football confines? Gailey’s firing has been the subject of widespread speculation, as he’s nearly joined the names above. It’ll be surpriseing if he isn’t canned given both his atrocious record over three seasons in Buffalo (even with a win today the Bills will be 16-32 during Gailey’s time as their head coach), and the growing angst over his old man stubbornness and archaic offensive mind this year. At some point, giving the ball to your best offensive player — one C.J. Spiller — much, much more often seems like a good idea.

Will Nix follow him though? It seems the Bills’ house is about to be cleaned. We’re gonna need a lot of brooms, guys.

Mark Gaughan of the Buffalo News cited several league sources who said they expect a full house cleaning over the coming days with the Bills set to miss the playoffs for the 13th straight year.

If and when that happens, it’ll be the appropriate look for a franchise that’s underachieved drastically despite spending significant dollars and draft picks on the defensive side of the ball this past offseason. Although the pass rush led by Mario Williams eventually turned around after a slow start (Williams has 10.5 sacks heading into today), Buffalo’s run defense ranks last in the league while giving up 146.7 yards per game, which has contributed significantly to their 28.4 points allowed per game (31st), and the 364.9 average total yards they’ve given up each week (22nd).

So yeah, Dave Wannestedt should be among the rolling heads too. Clean that house, and clean it good.

Elsewhere, Tony Sparano’s firing is a formality too, while Mike Munchak will likely be spared, and Lovie Smith’s status remains highly uncertain if the Bears lose today and fail to make the playoffs after a strong start, especially with his difficult contract situation.

Welcome to firing season.