About an hour after second-year quarterback Bo Nix led the Broncos to a 33-30 win on Wil Lutz’s 23-yard field goal in overtime Saturday, Denver coach Sean Payton returned to the postgame lectern to deliver the stunning news.

He said Nix broke his right ankle a few plays before Lutz’s kick sent the top-seeded Broncos (15-3) to the AFC championship game against either New England or Houston.

Nix will have season-ending surgery Tuesday in Birmingham, Alabama.

Backup QB Jarrett Stidham takes over for Nix. He took just one snap this season, a kneel-down in a blowout win over Dallas in Week 8.

Stidham has appeared in 20 games in six NFL seasons, starting four and winning one.

Nix got hurt on a keeper where he lost 2 yards and was tackled by safety Cole Bishop. Nix was limping after the play, but there was no indication that he suffered such a serious injury.

On the next play, Nix threw a deep pass to Marvin Mims Jr. that drew a 30-yard pass interference flag and got the Broncos well into field-goal range. Nix then took a knee to center the ball for Lutz’s game-ending field goal.

Nix tied Russell Wilson’s NFL record with two dozen victories in his first two seasons. Saturday’s victory was his first in the playoffs. The Broncos lost last year at Buffalo but Nix led Denver to the AFC’s top seed this season.

Before word of Nix’s injury broke, Denver was jubilant over the Broncos’ first playoff victory in a decade.

Denver’s game-winning drive came after nickel back Ja’Quan McMillian intercepted Allen’s deep pass in overtime. McMillian’s pick was Denver’s fifth takeaway of the game after they were minus-3 in turnover differential during the season.

McMillian wrested the ball away from Brandin Cooks at the Broncos 20-yard line when a field goal would have won the game for Buffalo (13-6).

SEAHAWKS 41, 49ERS 6

SEATTLE — Former Weber State star Rashid Shaheed returned the opening kickoff for a touchdown, Kenneth Walker III rushed for three scores and Seattle advanced to the NFC championship game with a dominant victory over San Francisco.

Sam Darnold threw a touchdown pass and got his first career playoff win in his first season with the Seahawks (15-3), who will host either the Chicago Bears or the Los Angeles Rams next Sunday with a trip to the Super Bowl at stake.

The Seahawks led 7-0 13 seconds into the game thanks to Shaheed, who fielded the opening kick and took it 95 yards to the end zone. It was the fourth kickoff return for a touchdown to open a playoff game since 2000 and the longest postseason kick return in franchise history.

Darnold, who had been listed as questionable because of an oblique injury, guided the Seahawks on two more scoring drives before San Francisco got on the board with the first of its two field goals.

After he flopped in his playoff debut last season with the Minnesota Vikings by taking nine sacks in a 27-9 loss to the Los Angeles Rams, Darnold completed 12 of 17 passes for 124 yards and connected with Jaxon Smith-Njigba for a touchdown in the star receiver’s playoff debut.

The 49ers (13-6) were never competitive in the second-most lopsided playoff loss in franchise history. San Francisco lost 49-3 to the New York Giants in the divisional round in the 1986 season.

The Niners were missing three injured All-Pros: tight end George Kittle, linebacker Fred Warner and defensive end Nick Bosa.

PATRIOTS 28, TEXANS 16

FOXBOROUGH, Mass. — Drake Maye threw three touchdown passes, Marcus Jones returned one of C.J. Stroud’s four interceptions for a score and the New England Patriots defeated the Houston Texans 28-16 on Sunday to advance to the AFC championship game for the first time in seven years.

In Mike Vrabel’s first season as coach, the Patriots will make their 16th conference championship game appearance and first since their run to their sixth Super Bowl title under Bill Belichick in the 2018 season. New England has won its last nine divisional round games.

Maye finished 16 of 27 for 179 yards, but had an interception and fumbled four times, losing two in cold conditions in which snow and rain fell throughout the game. One of Maye’s fumbles set up Houston’s first touchdown.

Carlton Davis III had two interceptions for New England. Craig Woodson added an interception and fumble recovery.

The eight combined turnovers — Woody Marks also lost a fumble for Houston — were the most in a playoff game since 2015 when the Cardinals and Panthers combined for eight in the NFC championship game.

The Texans have lost in the divisional round in three straight seasons under coach DeMeco Ryans. The franchise is now 0-7 all-time in this round.

Stroud finished 20 of 47 with a TD pass. All of his interceptions came in the first half as he became the first player with five or more INTs and five or more fumbles in a single postseason. Will Anderson forced two fumbles for the Texans.

RAMS 20, BEARS 17, OT

CHICAGO — Matthew Stafford and Los Angeles survived an incredible throw by Caleb Williams that forced overtime, beating Chicago Bears to advance to the NFC championship game.

Harrison Mevis kicked a 42-yard field goal in OT after Kam Curl intercepted a deep pass by Williams on the Bears’ first possession of the extra period. Stafford completed a 16-yard pass to Puka Nacua to get the Rams into field-goal range and set up Mevis, known as the “Thiccer Kicker,” for the game-ending kick. He was mobbed by teammates while a crowd that was rocking earlier watched in near silence.

The Rams (14-5) will visit NFC West rival Seattle next Sunday in their first trip to the conference championship game since the 2021 team won the Super Bowl. The Seahawks beat San Francisco 41-6 on Saturday.

Los Angeles led 17-10 in the final minute and the Bears faced fourth-and-4 from the 14-yard line when Williams backpedaled to avoid the pass rush and heaved the ball to Cole Kmet for the tying touchdown with 18 seconds left. Although officially a 14-yard pass, the ball traveled 51.2 yards in the air, according to the NFL’s Next Gen Stats.