Early in the 2026 NFL season, undefeated teams like the Kansas City Chiefs and Minnesota Vikings anchor their conference standings after four weeks, while several 3-1 squads including the Jacksonville Jaguars, Buffalo Bills, Cleveland Browns, and Baltimore Ravens hold division leads or wild-card spots. Recent Week 4 results shifted momentum, with the New England Patriots upsetting the Bills and the Carolina Panthers rallying behind strong offensive performances. Upcoming Week 5 matchups feature key divisional tests and cross-conference games that could clarify playoff positioning, as teams navigate injuries, rest advantages, and schedule strength in the race for the seven postseason berths per conference.