The 1973St. Louis Cardinals season was the 54th season the team was in the league. The team matched their previous output of 4–9–1, finishing with that record for the third straight season. They failed to reach the playoffs for the twenty-fifth straight season. Their tied game, their first NFL game against the Denver Broncos, was the nearest they would come to beating that franchise until 2010, and the only time the Broncos would play at Busch Memorial Stadium (they would play at Edward Jones Dome in 2000).