Bills 17, Steelers 10 Powered by a defense that produced four interceptions, Buffalo clinched its second playoff berth in three years. The Bills are up to 10 wins for the first time since 1999.

Seahawks 30, Panthers 24 In his 100th victory as Seattle’s coach, Pete Carroll got a balanced effort from his offense, which generated 428 yards, and an uneven one from his defense, which gave up 414 yards and 24 points, but survived thanks to three turnovers. The win, combined with San Francisco’s loss, put Seattle back in the No. 1 seed in the N.F.C.

Chiefs 23, Broncos 3 The switch from Joe Flacco to Drew Lock at quarterback did not seem to matter as far as this A.F.C. West rivalry was concerned, as Kansas City finished a two-game sweep of Denver this season having outscored the Broncos by a combined total of 53-9.