Stay here for live N.F.L. scores, updates and analysis from Week 5:
Credit George Bridges/Associated Press
Are the Kansas City Chiefs the best team in the N.F.L.? Should the Buffalo Bills and Los Angeles Rams really have the same records as the Green Bay Packers and the Pittsburgh Steelers? No real pecking order has been established this season, so perhaps Week 5 can quiet down some of the noise and establish the real contenders.
Here are some of the things to watch out for this week:
Three quarterbacks to watch
No position affects an N.F.L. game as directly as quarterback, and there is plenty of uncertainty at that position this week.
■ Marcus Mariota of the Tennessee Titans, who is technically a game time decision with a hamstring injury, is not expected to play against Miami, forcing the team to start Matt Cassel.
■ Derek Carr of the Oakland Raiders broke a bone in his back last week, and while he returned to practice far ahead of schedule, the team is likely to start E.J. Manuel against Baltimore.
■ Cam Newton of the Carolina Panthers, who spent the week dealing with the distraction of his sexist remarks at a news conference, is also on his team’s injury report in his continuing recovery from off-season shoulder surgery. He is expected to play, but his inability to participate fully in practices keeps his health in question.
Three rookies to watch
■ Myles Garrett, the No. 1 overall pick in the 2017 draft, will make his debut for the Cleveland Browns. He missed the first four weeks with an ankle injury, and will be trying to help his team get its first win of the season against a Jets team that is surprisingly 2-2.
■ Last week, Deshaun Watson of the Houston Texans joined Fran Tarkenton, the Hall of Fame quarterback of the Minnesota Vikings, as the only rookie passers to have a game with four passing touchdowns and one rushing touchdown. The week before he had passed for more than 300 yards against New England. He still needs to cut down on his turnovers, but a strong performance on national television against the undefeated Chiefs tonight would do a lot to build his hype.