NFL Week 4 takeaways - Lessons, big questions for every game

Week 4 of the 2022 NFL season got underway Thursday night with a Cincinnati Bengals win that was overshadowed by a frightening injury to Miami Dolphins QB Tua Tagovailoa, who suffered a concussion and was briefly hospitalized.

The timing of the concussion ignited renewed scrutiny of the hit Tagovailoa took four days earlier against Buffalo. The independent neurotrauma consultant who evaluated Tagovailoa on Thursday was fired.

Sunday's action kicked off early (9:30 a.m. ET) as the Minnesota Vikings took on the New Orleans Saints in Tottenham Hotspur Stadium in London. The game came down to the final seconds when Will Lutz's 61-yard field goal attempt hit off the upright and the crossbar but fell no good.

Our NFL Nation reporters react with the biggest takeaways and lingering questions coming out of this week's matchups and look ahead to what's next. Let's get to it.

Jump to a matchup:

MIN-NOR | MIA-CIN

What to know: The Vikings are 3-1 even though their offense and defense, overhauled in the transition to new coach Kevin O'Connell, are very much a work in progress. Sunday's game in London was won by their special teams — place-kicker Greg Joseph kicked five field goals, including a game-winner from 47 yards out — and sealed only when Saints place-kicker Will Lutz hit the upright from 61 yards away. Meanwhile, the offense has been disjointed and has struggled to get snaps off before the play clock. And the defense has given up huge chunks of yards at inopportune times.

Is quarterback Kirk Cousins going to be able to sharpen up in this offense? Cousins had a decent line Sunday, completing 25 of 38 passes for 273 yards, and made the key pass in the game to set up the game-winning field goal. But he missed receiver Justin