The Kansas City Chiefs beat the Los Angeles Chargers 22-6 on Sunday at Arrowhead Stadium to stay unbeaten, The Associated Press and the Los Angeles Times reported. Kansas City is 5-0, the AP reported, and the Chargers fell to 0-6, the AP and the Times reported.

Kenneth Walker III ran 19 times for 128 yards and two touchdowns, the AP and the Times reported. He scored on a 33-yard run in the first quarter and a 2-yard run later in the first half, the AP reported. Walker, signed as a free agent, leads the NFL in rushing, the AP reported.

Patrick Mahomes threw for 272 yards, the AP and the Times reported. The Times said he completed 23 of 30 passes with one interception. The AP reported that it was Mahomes' 100th career win.

Xavier Worthy caught seven passes for 73 yards, and Travis Kelce caught five for 53, the AP reported. Harrison Butker missed an extra point and a field goal try, the AP reported.

Justin Herbert completed 22 of 37 passes for 204 yards with one interception, the AP and the Times reported. The Times reported that he was sacked four times, including twice on the final drive. His interception to Jack Cochrane was his league-leading eighth of the season, the AP reported.

The Chargers are 0-6 for the first time since 2000, the AP and the Times reported. The Times said they have lost nine straight games dating to last season. Los Angeles played without offensive linemen Joe Alt and Kayode Awosika and receiver Tre' Harris, and Ladd McConkey left with a concussion, the AP reported.

"There's no justification," Chargers coach Jim Harbaugh said, the AP reported. "Definitely, offensively, we need to evaluate."

Kansas City joined San Francisco and Minnesota as the NFL's only unbeaten teams, the AP reported. Chiefs cornerback Chris Roland-Wallace was ejected in the fourth quarter for throwing a punch, the AP reported.

What we know: The Chiefs won 22-6 to reach 5-0, and the Chargers are 0-6.
What we don't: How long McConkey will be out with his concussion.