Next Up: A Sunday Night Showdown in Seattle

KANSAS CITY, Mo. — The perfect start is about to meet the loudest road test in football.

Kansas City takes its 5-0 record to Seattle on Sunday night for a primetime matchup with the Seahawks at Lumen Field (kickoff 7:20 p.m. CT, NBC). It is the kind of game the schedule makers dream about: an unbeaten team, a famously deafening stadium, a national audience — and a homecoming storyline layered right on top of it.

The homecoming

Kenneth Walker III returns to Seattle, where he won Super Bowl 60 MVP honors, now wearing red and gold and leading the league in rushing. Walker's first five games with Kansas City have been historic — 665 rushing yards, the most ever by a player in his first five games with a team, at a league-best 6.3 yards per carry and 133.0 yards per game.

He was at it again on Sunday, hanging 128 yards and two touchdowns on the Chargers in a 22-6 win. Now he walks back into his old building as the engine of somebody else's offense. If there is a reception waiting for him, it will be complicated — grateful for the ring, wary of the damage. Expect Lumen Field to be at full volume from his first carry.

The Rice question

The one lineup mystery hanging over the week is at wide receiver. Rashee Rice has been working his way back from the hamstring injury he suffered in Week 4, and he is nearing a return that would hand Patrick Mahomes another weapon at exactly the right stretch of the schedule.

Head coach Andy Reid, however, is in no hurry to tip his hand. Asked about Rice this week, Reid stayed noncommittal: "We'll see where he's at." In the meantime, Andrew Armstrong and Justin Watson have filled in admirably in the rotation — but a healthy Rice changes how defenses have to line up, especially in a building where communication at the line of scrimmage is half the battle.

What to watch

Start with the defense. Kansas City just held Los Angeles without a touchdown, sacked Justin Herbert four times and forced the fourth-quarter takeaway — Nick Bolton's forced fumble, recovered by Drue Tranquill — that sealed a 22-6 win. Mahomes, meanwhile, quietly collected the 100th win of his career, tying Tom Brady as the fastest to get there. This is a complete team walking into the noise.

That is the real matchup Sunday night: a complete team against an environment designed to break one. Silent counts, false starts, burned timeouts — Lumen Field has undone polished offenses before. Kansas City's reward for surviving it would be a 6-0 start and a firmer grip on the AFC West. The Kingdom would not have it any other way.

Watch-party ready? The Tailgate collection was built for Sundays like this.