The 1973Denver Broncos season was the team's 14th year in professional football and its fourth with the National Football League (NFL). Led by second-year head coach and general manager John Ralston, the Broncos posted a winning record for the first time in franchise history, with seven wins, five losses, and two ties, which tied for sixth-best in the conference. It was the first time in franchise history that they won more than five games. Denver tied for second in the AFC West (third with tiebreaker), 1½ games behind the Oakland Raiders.
After a 1-3 start, Denver went unbeaten in seven straight games. The last of these was a 14-10 win over Kansas City, only the third win in 28 games all-time vs. the Chiefs franchise. The win put the Broncos in first place in the division at 6-3-2. After a split of the next two games, the final game of the regular season was a 21-17 loss at Oakland, making the Raiders division champions.