The NFL rolls into Week 4 with two significant trends that separate this year from any other season: quarterbacks are getting younger and league-wide passer rating is on an upward slope. Through three weeks, the NFL has seen the highest collective passer rating (93.4) and the most starting quarterbacks age 26 or younger in league history (20 in Week 3). Meanwhile, each week continues to produce close games, stirring second-half comebacks and rookies progressing into household-name territory.

Twenty-three of the first 48 games have been decided by six points or fewer. Four teams that missed the postseason in 2018 – Buffalo, Detroit, Green Bay and San Francisco – are undefeated. Meanwhile, both New England and the Los Angeles Rams are 3-0 after meeting in Super Bowl LIII — a feat not accomplished since 1998.

Two games on Sunday feature a battle of undefeated foes — New England at Buffalo (1:00 PM ET CBS) and Kansas City at Detroit (1:00 PM ET FOX). Sunday Night Football will see Dallas making a trip to face New Orleans (8:20 PM ET, NBC), where a victory would give the Cowboys their best start in 12 years. 

See the full Week 4 preview.