The Minnesota Vikings have paced early 2026 NFL defensive efficiency metrics, including the league's lowest points allowed per game and top marks in success rate and EPA per play through Week 4, under coordinator Brian Flores. The Seattle Seahawks remain close behind with elite run-defense grades and total yards allowed despite depth challenges at safety. Preseason projections highlighted the Houston Texans' complete front and secondary, while Jacksonville, Atlanta, and Las Vegas have posted surprise results. Roster health, upcoming schedule strength, and late-season regression risks tied to turnover variance will shape final ratings across advanced analytics and traditional stats.