Watch: Broncos' Marlon Mack scores on 66-yard touchdown run

Early in the third quarter, the Chiefs pressured the Broncos, which was a mistake. Mack broke through their defense and scored his first touchdown of the season. 

Mack's play continues to build momentum for Denver, who is slowly mounting a comeback against Kansas City. It trails 27-21.

After falling behind 27-0, Denver intercepted Patrick Mahomes twice. Russell Wilson and company scored points off each turnover. Wilson threw two touchdown passes to wideout Jerry Jeudy and cut the deficit to 27-14 before halftime. 

Mack's touchdown might mark a vital turning point since the Broncos continued to whittle the Chiefs' lead down and gave them momentum.

If the Broncos (4-9) can pull off a miraculous upset, it would be a consolation prize for a disappointing season. 

Through 12 games, the Broncos rank last in scoring offense (13.8 points per game) They've only passed the 20-point mark twice. The ineptitude was unexpected since they traded two first-round draft picks (2022 and 2023) for Wilson, believing he could save the franchise.

Since many questions surround the organization, it would take a victory over the Chiefs (9-3). The Broncos have lost 13 straight games to them.