Kenneth Walker III wasn't brought to Kansas City to replace Patrick Mahomes as the face of the offense. The Chiefs simply needed someone who could take some pressure off their quarterback and give opposing defenses another problem to worry about.
Four games later, Walker has become a pretty big problem.
The 25-year-old has rushed for 537 yards, averaging more than 134 yards per game. According to Chiefs senior team reporter Matt McMullen, no NFL player has accumulated that many rushing yards through his team's first four games since 2010.
Sixteen years. That's how far back you have to go to find someone who started a season this well on the ground. And the Chiefs are getting that production from a running back who wasn't even on their roster last year.
Kenneth Walker III has made last year's rushing numbers look embarrassing
Here's a comparison that probably won't make Kansas City's running backs from 2025 feel particularly good.
Through four games last season, the Chiefs' entire backfield combined for 266 rushing yards. Walker has 537 by himself this year.
He's also accumulated 367 yards after contact. That's 101 more yards than Kansas City's running backs had altogether through four games a year ago.
Walker isn't just benefiting from enormous holes created by the offensive line. He's making defenders miss, breaking tackles, and picking up yards on plays that might have gone nowhere last season.
His 39 forced missed tackles were the most in the NFL through Week 5, despite Kansas City having already taken its bye week. That's a fairly ridiculous statistic when you consider other running backs had an additional game to work with.
The Chiefs have also produced six rushing plays of at least 20 yards this season. They had three during the entirety of 2025. Kansas City spent all of last year struggling to find explosive runs. Walker has helped double that total before Halloween.
For an offense that has relied so heavily on Mahomes, it's a welcome change.
Patrick Mahomes is getting something he hasn't had in years
Opposing defenses have spent years trying to figure out how to slow down Mahomes. Some have dropped additional defenders into coverage, while others have focused on eliminating the explosive passing plays that once made Kansas City's offense nearly impossible to contain.
The Chiefs haven't always had an answer.
When the running game wasn't working, defenses could afford to devote more attention to Mahomes. They weren't particularly worried about Kansas City handing the football off and consistently picking up significant yardage.
That luxury is disappearing.
Walker has given Andy Reid a running back who can make a defense regret ignoring the ground game. And when opponents start creeping toward the line of scrimmage, Mahomes has more room to work downfield.
Kansas City recorded 11 passing plays of at least 20 yards through four games, the second-most in the NFL at that point.
Mahomes is also off to his best statistical start in several categories since 2022, when he won his second MVP award and led Kansas City to a Super Bowl championship.
That doesn't mean Walker deserves all the credit for Mahomes' success. But having a legitimate rushing threat certainly hasn't hurt.
For once, defenses have to spend just as much time worrying about what happens when Mahomes hands the ball off.
The Chiefs may have found the missing piece to their offense
There's still a long way to go before anyone starts talking seriously about Walker challenging the NFL's single-season rushing record.
At his current pace, he'd finish a 17-game season with more than 2,200 yards. That would put him in extraordinary company, although expecting anyone to maintain 134 rushing yards per game is asking quite a bit.
Still, Kansas City didn't need Walker to threaten a record to justify bringing him aboard.
The Chiefs needed a reliable running game. They needed someone capable of picking up difficult yards without requiring Mahomes to rescue every possession. And they needed more explosive plays from a position that hadn't provided nearly enough of them.
Walker has delivered all three.
Sunday's matchup with the Los Angeles Chargers gives him another opportunity to show what he's brought to Kansas City. The Chiefs enter the game at 4-0, looking to remain undefeated and improve to 3-0 in the AFC West.
What makes Walker's production especially encouraging is that Kansas City hasn't had to reinvent its offense to accommodate him.
Mahomes is still Mahomes. Reid is still calling plays. Travis Kelce remains an important part of the passing attack.
The difference is that opposing defenses now have another player who can ruin their afternoon.
After watching the Chiefs struggle to run the football last season, that's a pretty good problem for Kansas City to have.
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