While the Houston Texans and the Green Bay Packers clinched their divisions with victories over their closest division competition — five of eight divisions have now been locked up — the N.F.C. East and the A.F.C. North were roiled Sunday, with the favorites fading to jeopardize their postseason hopes.
One thing is certain: if the N.F.L. is looking for an example in favor of an expanded playoff field, the N.F.C. could provide it this season. It finished Sunday with nine teams above .500.