On the first weekend of December, four teams made the NFL playoffs.
With four weeks to go in the regular-season, New England owns the AFC East title, Denver has the AFC West and Atlanta won the NFC South.
Houston has not clinched the AFC South, although it has a three-game lead over Indianapolis, but it secured at least a wild-card spot on Sunday.
The Patriots (9-3) beat Miami 23-16 for their sixth straight win. It also was Tom Brady's 10th division title, the most for any quarterback in NFL history.
Denver (9-3) has won seven in a row after defeating Tampa Bay 31-23, and with that loss by the Bucs, the Falcons (11-1) were guaranteed their division title. Atlanta beat New Orleans 23-13 on Thursday night.
The Texans (11-1) beat Tennessee 24-10, but with the Colts (8-4) winning 35-33 at Detroit, the AFC South remains undecided. Houston and Indianapolis meet twice in the last three weeks.
Baltimore (9-3) has a two-game lead on Pittsburgh and Cincinnati in the AFC North, and the Bengals still have both division rivals left on their schedule. The Ravens lost 23-20 to the Steelers on Sunday, while the Bengals won 20-13 at San Diego.
San Francisco's 16-13 loss in overtime at St. Louis tightened up the AFC West as Seattle (7-5) defeated Chicago 23-17 in OT. The 49ers have a 1½-game lead on the Seahawks.
The New York Giants (7-4) entered the weekend up two games up in the NFC East and they face Washington on Monday night.
Green Bay (8-4) and Chicago are tied atop the NFC North. The Packers have beaten the Bears already and they meet Dec. 16 at Soldier Field.