Bo Nix’s career day punched the Denver Broncos’ ticket to the playoffs with a 38-0 rout of the Kansas City Chiefs on Sunday afternoon.

It is the first time since the 2015 season that the Broncos have reached the postseason.

Nix completed his first 18 passes and was 26 of 29 for the game, an 89.7 completion percentage that set a new Broncos’ single-game record. Nix set a career high with 321 yards and also had four touchdown passes. He led the Broncos with 47 rushing yards as the club clinched the No. 7 seed in the AFC playoffs.

With the No. 1 seed in the AFC playoffs wrapped up, the Chiefs rested Patrick Mahomes, Travis Kelce, Isiah Pacheco, Chris Jones, Jawaan Taylor and George Karlaftis.

Cortland Sutton had five catches for 98 yards and a touchdown. Marvin Mims Jr. hauled in five passes for 51 yards and two touchdowns and Devaughn Vele had four catches for 50 yards and a touchdown for Denver (10-7).

Nik Bonitto had two sacks, Jonathon Cooper, Jordan Jackson and John Franklin-Myers each had a sack for Denver. The Broncos (10-7) held the Chiefs (15-2) to five first downs and 98 total yards.

Carson Wentz was 10-of-17 passing for 98 yards for the Chiefs.

The Broncos opened the game with a six-play, 70-yard scoring drive. A play-action pass play featured a fake hand off, fake reverse and screen pass from Nix to Mims for a 32-yard touchdown and a 7-0 lead.

After its defense forced the Chiefs into a three-and-out, Nix engineered a 10-play, 85-yard scoring drive. The big play was a 47-yard completion where Nix rolled to his right and lofted a deep pass to Sutton. Two plays later, the same duo hooked up for a 10-yard touchdown and the Broncos took a 14-0 first-quarter lead.

Everything was going the Broncos’ way when Nix’s 10-yard pass ricocheted off the outstretched arm of Chiefs’ defensive back Keith Taylor into the arms of a diving Devaughn Vele for a 3-yard touchdown as Denver went up 21-0 with 6:46 left in the second quarter.

Wil Lutz nailed a 33-yard field goal in the closing seconds of the second quarter as the Broncos took a 24-0 halftime lead. It was the first time in 61 games Kansas City was held scoreless in the first half.

Late in the third quarter Nix tossed a 7-yard touchdown to Mims for a 31-0 Broncos’ lead. Audric Estime added a 1-yard touchdown run with 8:11 left as Denver extended its lead to 38.