DENVER - The Los Angeles Chargers found a new way to lose during their rough season Sunday, falling 23-20 after a last-second pass interference penalty.
The infraction was called on cornerback Casey Hayward, a 37-yard mark-off that set up Brandon McManus' game-winning 53-yard field goal as time expired.
Denver took over for the final possession at its own 28-yard with only nine seconds remaining.
The Chargers appeared to send the game into overtime on a 46-yard field goal by Michael Badgley with 14 seconds remaining.
The kick came after they converted a fourth-and-11 following consecutive false start penalties on offensive linemen Dan Feeney and Russell Okung.
Mike Williams made a mostly one-handed catch over Denver cornerback Isaac Yiadom for a 38-yard gain and first down at the Denver 38-yard line with two minutes remaining.
Playing a Denver team missing pass rushers Von Miller and Bradley Chubb and starting a rookie quarterback, the Chargers instead looked like the undermanned team for most of Sunday.
Oddly, they were actually as healthy as they've been all year.
All-Pro safety Derwin James made his season debut after missing the first 11 games because of a stress fracture in his right foot.
Safety Adrian Phillips, a 2018 All-Pro on special teams, also played for the first time since Week 2 when he broke his arm during a loss in Detroit.
Starting offensive tackles Okung and Sam Tevi came back after being out with injuries.
Still, the Chargers were unable to overcome a sluggish start that saw them fall behind 14-0 early before rebounding to tie the score twice in the fourth quarter.
The Chargers fell to 4-8, the same record as Denver.
They pulled even 17-17 with a five-play, 62-yard touchdown drive in the fourth quarter. Keenan Allen reached the end zone to conclude a 36-yard reception by leaping over Denver safety Will Parks.
The Chargers had a chance to take the lead three minutes later, but Badgley's 55-yard field goal attempt hit the left upright.
The kick came from five yards longer after Philip Rivers was sacked on third down. The miss also meant the Chargers couldn't capitalize on linebacker Denzel Perryman's diving interception that gave them the ball at the Denver 38-yard line.
Coming off back-to-back games in which he threw seven interceptions, Rivers was picked off to end the Chargers' second possession.
He was attempting to throw a screen to Austin Ekeler but instead the pass hit defensive end Dre'Mont Jones in the hands.
Six plays later, rookie quarterback Drew Lock connected with Courtland Sutton for a five-yard score to put the Broncos up 14-0 with 16 seconds left in the opening quarter.
Lock and Sutton had hooked up on a 26-yard touchdown on Denver's second possession, with Sutton making a diving, one-handed grab to beat Chargers cornerback Hayward.
The early deficit was nothing new for the Chargers this season, especially against the Broncos. During a Week 5 loss to Denver at Dignity Health Sports Park, the Chargers also trailed 14-0 after one quarter and 17-0 at halftime.
On Sunday, though, they responded quicker. After both teams kicked field goals, the Chargers' offense showed its first life of the day when Rivers hit Williams for a 52-yard gain in the final minute of the second quarter.
Following a false start penalty, Rivers and Ekeler got together for a 30-yard touchdown pass to make it 17-10 at halftime.
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