return to the field Cameron Erving Jersey , Chris Jones piled up some more sacks to match an NFL record, and the Kansas City Chiefs' maligned defense finally looked like a dominant force for a while.Or at least, one that wouldn't hold back their high-powered offense.But all that was wiped away in just more than three minutes Thursday night, when Philip Rivers engineered a dramatic fourth-quarterback comeback for the Los Angeles Chargers. The Chiefs did their part with blown assignments and penalties, and rather than clinch the AFC West title and a first-round playoff bye, they left Arrowhead Stadium with a 29-28 loss and the very real possibility of hitting the road for the postseason.Their defense had once again let them down."We've got to finish. Ain't no differences. We beat ourselves. That's how I feel," Chiefs linebacker Reggie Ragland said. "Only thing that can stop us is us, and we beat ourselves."Not at the start Reggie Ragland Jersey , when Berry returned from a heel injury that had kept him out since the opening weeks of training camp. Steven Nelson intercepted Rivers' pass on the second play of the game, Kendall Fuller picked off another throw in the end zone late in the first half and Berry was back in the middle of just about everything as he energized a raucous crowd that braved freezing temperatures.Jones finished with 2 1/2 sacks, tying an NFL mark with at least one in 10 straight games.But the plan all along was for Berry to only play a certain amount of snaps, and the Chiefs stuck to it by sitting him most of the second half. And while it might have been purely coincidence, that was when Los Angeles finally hit its stride on offense.After trailing the entire way, and still facing a 28-14 hole with 3:49 to go, Rivers led his team on a drive that fill-in running back Justin Jackson capped with a touchdown. And when the Chargers' own defense took the field, they did their job by quickly getting the ball back.Rivers started the deciding drive with a 31-yard strike to Travis Benjamin Jarvis Jenkins Jersey , then hit him again moments later to convert on fourth down. The Chiefs still had a chance to hold the Chargers, but Fuller was called for pass interference to give Los Angeles the ball just outside the end zone.Mike Williams hauled in a touchdown pass with 4 seconds to go. And when it was confirmed by video review, Chargers coach Anthony Lynn sent his team out for a 2-point conversion and the win.The Chiefs' defense had one more chance to make a stop, but nobody was within 10 yards of Williams as he made the catch and raced up the field to celebrate."It's definitely tough. Any time you get so close and come up short, it's tough, especially when you know how hard the guys you've been putting in the work with," Chiefs linebacker Dorian O'Daniel said. "It's frustrating obviously, but it's part of the game."Even more frustrating given what was at stake.The Chiefs (11-3) could have clinched their third consecutive AFC West crown Daniel Sorensen Jersey , something the club has never accomplished, along with a first-round playoff bye. And they could have earned home-field advantage throughout the AFC playoffs if Pittsburgh were to knock off New England on Sunday.Instead, their games at Seattle and home against Oakland have taken on real importance."If you narrow it down, it was both sides of the ball," Chiefs coach Andy Reid said. "We were in great position to get off the field. We didn't. We extended a lot of those drives with penalties, right or wrong. They're done. So we've got to do better. We're not making any excuses."Arrowheadlines: Andy Reid has reason to run the ball more in 2018 The latestChiefs’ brain trust running out of time for evaluations, roster decisions | Kansas City StarIs Andy Reid Ready to Let Patrick Mahomes Loose? 10 Thoughts on the 2018 Chiefs | Sports IllustratedTen-Year DVOA Rankings: Kansas City Chiefs | Real GM When sacking the quarterback goes wrong: ‘I’m so confused now,’ says Chiefs linebacker | Kansas City StarThe biggest winners and losers from Week 3 of the NFL preseason | SB NationChiefs’ Sammy Watkins: Catches first pass of preseason | CBS SportsBears position battles: Who’s in and who’s out on the 53-man roster? | NBC Sports ChicagoWhat we learned from Saturday’s preseason games | NFLFantasy football stock rising: Christian Kirk Harrison Butker Jersey , Rishard Matthews, Sammy Watkins | Penn LiveAround the leagueNFL, Jaguars issue statements on Jacksonville shooting | NFLEight-year NFL veteran Eric Decker announces his retirement from NFL | CBS SportsThe biggest injuries from NFL preseason Week 3 | ESPNLamar Jackson: ‘I hope people know I can throw now’ | NFLRichard Sherman: If NFL wants to police tackling, it should ‘put flags on quarterbacks’ | CBS SportsWhat’s the Verdict on 2018 NFL Preseason’s Top Breakout Performers? | Bleacher ReportCould the Modern NFL Ever Embrace a Two-Way Star Like Shohei Ohtani? | The RingerColts trade Antonio Morrison to Packers for CB Pipkins | NFLIn case you missed it at Arrowhead PrideSunday update: Andy Reid wants a four-man rotation at outside linebackerChiefs’ first-team defense underwhelming as Bears win, 27-20Andy Reid was surprisingly candid about Chiefs’ defensive struggles Saturday...Social Media Information:AP Facebook Page: Click here to like our pageAP Instagram: Follow @ArrowheadPrideAP Twitter: Follow @ArrowheadPrideAP Editor-in-Chief: Pete Sweeney: Follow @pgsween610 Sports Twitter: Follow @610SportsKC