Receiver Eric Saubert made the game-winning two-point conversion for the Seahawks.
Seattle staged a stunning fightback to overcome the Rams in extra time, securing their spot in the NFL play-offs.
Rallying from a sixteen-point hole in the final period, the Seahawks triumphed by a single point at home, notching their fifth straight victory.
While the Rams had already secured a playoff berth earlier on game day, the Seattle team booked their return to the postseason after a two-year absence.
With this outcome, the Seahawks now lead their Conference standings with a twelve and three mark, supplanting the Los Angeles, who dropped to the fifth playoff position with an 11-4 standing.
Quarterback Sam Darnold had two picks but regrouped to make two scoring throws, culminating in the tying TD to star receiver Jaxon Smith-Njigba in overtime.
The visitors held a 13-7 advantage at half-time before Kenneth Walker III broke free for a 55-yard scoring dash for Seattle.
Los Angeles cornerback Wallace then returned Darnold's initial interception for 56 yards, leading to a short touchdown by Corum on the next play.
In the final stanza, a touchdown from Stafford to Puka Nacua pushed the advantage to 30-14, but Shaheed provided the comeback with a 58-yard return for a score.
Darnold then found AJ Barner in the end zone, and a converted conversion forced the game into an extra period.
Although Nacua raced in for his another touchdown in overtime, Jaxon Smith-Njigba responded in kind to setup the game-winning conversion.
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