Cardinals Stun Rams in Biggest NFL Upset of the Season

The NFL Upset of the Season belonged to the Arizona Cardinals on Sunday, as the 13.5-point underdogs walked into SoFi Stadium and walked out with an 18-16 win over the Los Angeles Rams. Chad Ryland drilled a 43-yard field goal as the clock hit zero, sealing the biggest upset of the season and ending Arizona's losing streak in the most dramatic fashion possible.

The finish was breathless. Trailing 15-12 with under three minutes remaining, the Rams mounted a frantic scoring drive built on big passes to Puka Nacua and capped by a five-yard touchdown throw from Matthew Stafford to Colby Parkinson with 47 seconds on the clock. After the kickoff sailed into the end zone, the Cardinals answered with a 21-yard reception by Jalen Brooks and a 15-yard penalty on Josh Wallace that pushed them into range. Then the kicker did the rest, splitting the uprights as the clock hit zero.

Defense Carried Arizona to the Win

What made the result stunning was how completely the Cardinals flipped their recent form. A defense that had surrendered 45 points the previous week held Los Angeles to 16, a turnaround that defined the afternoon. The offense did its part without ever finding the end zone: Arizona generated 338 yards and scored on six of its ten possessions, with every point coming off the foot of the kicker.

Quarterback Jacoby Brissett managed the game with unusual calm for a team that had lost every week since the opener. After a shaky opening drive, he avoided sacks and turnovers for the rest of the afternoon while his team controlled the clock for long stretches and kept a dangerous Los Angeles offense on the sideline — a formula the Cardinals had not come close to executing all year. The unit that looked lost seven days earlier suddenly tackled in space, closed throwing lanes and forced the Rams into the long-yardage situations that stall drives.

CBS Sports analyst John Breech awarded the Cardinals a B grade for the performance, highlighting the defensive turnaround and special-teams execution as the keys to the upset. It was a measured verdict for a result that felt anything but measured: the long odds had matched the record for the largest margin of victory in an upset over the previous five years.

What the Loss Says About the Rams

For Los Angeles, the defeat was the most significant of Stafford's career to date, according to the game report, and it exposed problems that go well beyond one Sunday. The Rams began the year as Super Bowl favorites, yet the loss dropped them to 2-4, an identical record to the team they were supposed to dominate, and left them at the bottom of the NFC West. The offense looked disjointed, the defense failed to make critical stops, and special teams added to the damage — an injury to kicker Blake Grupe even forced punter Ethan Evans to handle an extra point attempt.

The wider picture is grim for a franchise built to win now. The injury crisis has already cost the Rams their star receiver, as the Rams' injury crisis deepens around their star receiver, and Sunday showed how thin the margin for error has become. A team that entered the season talking about February is now fighting to stay out of last place in October. Around the league, the pressure on underperforming contenders is already costing jobs, as seen when Indianapolis fired its general manager after a loss to a winless team.

The counterpoint is that Arizona remains a two-win team with plenty of flaws — one heroic afternoon does not make a contender. But that is exactly what makes the NFL Upset of the Season so compelling: in a league designed for parity, the gap between a Super Bowl favorite and a winless-afterthought can collapse in a single drive. The Cardinals proved it on Sunday, and the Rams are left to figure out how it happened. In betting terms, the result scrambled survivor pools and tickets across the country, with the heaviest underdogs to win outright this season cashing at long odds, according to the game report. For more on the league's strangest season, see how the Chargers are weighing an offense fix after a winless start.