Then there were two.

Six NFL teams entered Week 4 undefeated but only two remain. And they're the Super Bowl favorites.

The Buffalo Bills and Philadelphia Eagles are the only 4-0 teams left in the league.

Buffalo pulled away in the fourth quarter for a 31-19 victory over the winless New Orleans Saints . Philadelphia built an 18-point third-quarter lead and held off the previously unbeaten Tampa Bay Buccaneers (3-1), 31-25.

The Indianapolis Colts , Los Angeles Chargers and San Francisco 49ers suffered their first losses of the season.

Indianapolis gave up an 88-yard touchdown pass to Tutu Atwell with 1:33 left to lose 27-20 to the Los Angeles Rams . The Chargers turned the ball over twice fell 21-18 to Jaxson Dart in his debut for the New York Giants . San Francisco commi

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