Each Sunday, three of The Athletic’s NFL writers react to the biggest news, plays and performances from the day’s games.By the end of Week 4’s afternoon slate, the Baltimore Ravens were reeling, the Kansas City Chiefs seemed to have their groove back, the New York Giants had a sliver of hope, the New England Patriots had the day’s highest scoring output (while the Tennessee Titans had the same number of points they entered the day with) and the NFC West had a three-way tie for first place.NFL writers Ted Nguyen, Dan Pompei and Jourdan Rodrigue share their thoughts on a Week 4 in which injuries and upsets again scrambled the state of the league.The Ravens were already ravaged by injuries before Lamar Jackson left their 37-20 loss to the Chiefs with a hamstring issue. Now they’re 1-3 for the first time since 2015 and two games behind the Pittsburgh Steelers in the AFC North. How much trouble are the Ravens in?Rodrigue: Big trouble, not least because hamstring injuries can be so fickle, and you would hate to see the Ravens without any running threat at the quarterback position. The Ravens’ defensive struggles come up right along with these concerns for me — this isn’t a one-off issue, it’s a weeks-long problem that has loomed in the background of a season that started with sky-high expectations. And the defense is also dealing with injuries.Pompei: They are not in an enviable position, but if any team can dig out of a hole, it’s the Ravens. They will need to get healthy and stay healthy, and their margin for error will be slim the rest of the way. They’re going to need Kyle Van Noy, Nnamdi Madubuike, Ronnie Stanley, Nate Wiggins, Jaire Alexander, Patrick Ricard, Roquan Smith and, obviously, Jackson. But there is a decent chance they can beat the Houston Texans and Los Angeles Rams at home the next two weeks and go into their bye at 3-3. Then, the Ravens can start over.Nguyen: Beginning the season 1-3 is a tough hole to climb out of, but the AFC North is still wide open. The Cleveland Browns offense is the worst in the league, and the Cincinnati Bengals don’t have their franchise QB. The Steelers are 3-1, but they have holes. If Jackson is out for an extended period of time, the Ravens are in trouble. Defensively, they’ve taken too many injuries. That defensive line is razor-thin, and losing Wiggins in the secondary is huge; he left Sunday’s game with an elbow injury. How the Ravens respond in the next two games will likely decide their season.After getting receiver Xavier Worthy on the field, the Chiefs had their biggest scoring day in more than two years. Is their offense back?Nguyen: How their offensive line performs in the running and passing games will always decide their ceiling. It helps to get a starter like Worthy back, though. Patrick Mahomes looked comfortable against the Ravens pass rush — and shredded them. He and Worthy built some chemistry at the end of last season, and you saw that right away. Once Rashee Rice comes back from his six-game suspension, this offense could really be cooking with gas. The Chiefs should still commit a little more to being able to run the ball from under center, though, because of all the light boxes they see.Pompei: Play calling and execution are always a challenge when critical pieces are sidelined. The Chiefs are much better with Worthy, but it’s probably dangerous to believe he can transform the offense on his own. The Chiefs are going to need consistent pass protection, more from Isiah Pacheco and Kareem Hunt in the run game and help from other receivers, especially Rice. That being said, Kansas City has the potential to have one of the league’s most dangerous offenses — mostly because the guy who talks kind of funny is still winging it and that big guy with the mustache who likes cheeseburgers is still dialing up killer plays.Rodrigue: Worthy’s being a huge element to the Chiefs offense this year was clearly the plan, and you could see how they struggled to adjust after he took some friendly fire from teammate Travis Kelce in Week 1. Everything has felt too difficult and stifled for this offense, and Worthy’s speed and threat to create big plays from any type of concept Andy Reid can dream up — motions, sweeps, screens, downfield passes — make any defense think a little more. The Chiefs eclipsed 100 rushing yards against the Ravens without having to overly rely on Mahomes’ scrambling (though Mahomes entered the game as Kansas City’s leading rusher), and they are committed to a similar carry split between Pacheco and Hunt that we saw in Week 3. I’d like to see them continue to workshop their ground game and further open things up for all the speed lying in wait within this offense.The Rams, 49ers and Seahawks are tied atop the NFC West at 3-1, and the Arizona Cardinals are 2-2. Who do you like to win that bruising division — and why?Pompei: It’s going to depend on which teams stay healthy and probably will come down to an early January kick. The Rams and Seahawks appear to be pretty evenly matched. The 49ers definitely would have been in the mix with Nick Bosa, who was playing like a Defensive Player of the Year candidate before his ACL injury. They might still rise as they get healthier at other positions. By that time, however, they might be trailing the pack. The Rams’ 27-20 victory over the undefeated Indianapolis Colts on Sunday probably was the most impressive victory in the division to date, although the Seahawks arguably will have a chance to top that next week against the Tampa Bay Buccaneers.