The division showdowns were won by the Packers, Panthers and Steelers. On to the playoffs.
Also qualifying for the Super Bowl chase were the Ravens, who got the final AFC wild card. And the Seahawks secured home-field advantage in the NFC playoffs, not a pleasant prospect to the rest of the conference.
Like Seattle, Green Bay finished 12-4 after defeating Detroit 30-20 Sunday. But the Seahawks, who beat St. Louis 20-6, held the tiebreaker because they beat the Packers in the season opener.
"Our main goal coming into the season was winning the division, but getting the No. 1 seed is just as big," Seattle linebacker K.J. Wright said.
Carolina (7-8-1) became the second division winner in NFL history with a losing record, but has won four in a row after a 34-3 romp at Atlanta to secure the NFC South.
"It feels great," Carolina running back Jonathan Stewart said. "I mean, it's a blessing and you just have to cherish these moments right now. ... We just believed and played our hearts out and this is where we are."
Dallas (12-4) already owned the NFC East crown and won at Washington 44-17.
Pittsburgh (11-5) took down Cincinnati 27-17 to wrap up the AFC North. The Bengals (10-5-1) got a wild card.
Denver's 47-14 win over Oakland gave the Broncos (12-4) a first-round bye as AFC West champion. New England, also 12-4 by with a victory over Denver, has the top seed, even though it fell at home to Buffalo 17-9.
Indianapolis already had the AFC South title; it beat Tennessee 27-10.
The playoff schedule:
Saturday, Jan. 3: Arizona at Carolina, followed by Baltimore at Pittsburgh.
Sunday, Jan. 4: Cincinnati at Indianapolis, followed by Detroit at Dallas.
Saturday, Jan. 10: New England will host an afternoon game, followed by Seattle hosting the prime-time match.
Sunday, Jan. 11: Green Bay hosting, followed by Denver at home.