Tight end Eric Saubert executed the decisive two-point play for the Seahawks.
Seattle engineered a stunning fightback to defeat the Rams in overtime, clinching their spot in the NFL play-offs.
Rallying from a 30-14 hole in the final period, the Seattle squad triumphed by a single point at home, notching their fifth straight win.
While the Los Angeles had already secured a playoff spot earlier on game day, the Seattle team booked their return to the play-offs after a 24-month hiatus.
With this outcome, the Seattle now lead their Conference race with a twelve and three record, replacing the Rams, who fell to the fifth seed with an eleven and four standing.
Signal-caller Sam Darnold threw two interceptions but recovered to make two scoring throws, including the tying score to star receiver Jaxon Smith-Njigba in the extra period.
The visitors held a six-point advantage at half-time before Kenneth Walker III broke free for a 55-yard scoring dash for Seattle.
Los Angeles defensive back Wallace then returned Darnold's first pick for 56 yards, setting up a short touchdown by Corum on the next play.
In the fourth quarter, a scoring pass from Matthew Stafford to Puka Nacua pushed the Rams' lead to sixteen points, but Shaheed provided Seattle's hope with a 58-yard return for a score.
Darnold then connected with AJ Barner in the end zone, and a converted conversion forced the contest into overtime.
Although Nacua raced in for his another touchdown in overtime, Jaxon Smith-Njigba responded in kind to setup the game-winning score.
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