K.C. showdown

Just two undefeated teams remain as Week 5 kicks off in earnest Sunday: the 4-0 Chiefs and Rams. There are, however, seven teams at 3-1, and last season’s Super Bowl contenders — the Eagles and Patriots — are mired at 2-2.

With that, here’s The Post’s High Five for Week 5:

The 4-0 Chiefs, led by wunderkind quarterback Patrick

Mahomes, own the NFL’s top scoring offense (36.3 per game), and the 3-1 Jaguars have the league’s top-ranked defense (14 allowed per game). Obviously, something has to give.

In his second season, Mahomes has thrown for 1,200 yards and has 14 TDs and no INTs. The Chiefs have scored 18 TDs on offense. The Jags have allowed just five TDs in four games.

Jags coach Doug Marrone, assessing Chiefs skill position players Mahomes, receiver

Tyreek Hill, running back Kareem Hunt and tight end Travis Kelce: “It’s kind of unbelievable. We’ve got our hands full.”

One of the juicy subplots is the matchup between Jacksonville’s loquacious cornerback Jalen

Ramsey and Hill. “I don’t like how whoever has made it a matchup me against Tyreek,” Ramsey told reporters. “He’s good for what he does for their team. He made All-Pro as a return specialist … let’s get that right, as a return specialist. I made AllPro in my position as a corner. So it’s not a wide receiver versus corner matchup, so we can get that out of the way off the bat.”

This was a Ramsey response to Hill calling Ramsey “all right, I guess’’ then telling reporters he hoped Ramsey plays press coverage against him.

“If he wants smoke, it’ll get there,” Ramsey said.