Tight end Eric Saubert made the game-winning two-point play for Seattle.
The Seattle Seahawks engineered a stunning comeback to defeat the Rams in extra time, securing their place in the NFL play-offs.
Overcoming a sixteen-point deficit in the final period, the Seahawks triumphed 38-37 at home, registering their fifth straight victory.
While the Los Angeles had become the first to earn a post-season spot earlier on game day, the Seattle team booked their return to the postseason after a two-year hiatus.
With this result, the Seahawks now lead their Conference race with a twelve and three record, replacing the Rams, who dropped to the number five playoff position with an eleven and four standing.
Signal-caller Darnold threw two picks but recovered to deliver two scoring throws, culminating in the tying score to star receiver Jaxon Smith-Njigba in overtime.
The Rams held a 13-7 advantage at the break before Kenneth Walker III broke free for a long touchdown run for Seattle.
Rams defensive back Josh Wallace then returned Darnold's first interception for a big return, leading to a one-yard score by Corum on the next play.
In the fourth quarter, a scoring pass from Matthew Stafford to Nacua extended the Rams' lead to 30-14, but Shaheed provided Seattle's hope with a spectacular punt return.
Darnold then found Barner in the endzone, and a converted conversion sent the game into an extra period.
Although Nacua raced in for his another touchdown in OT, Jaxon Smith-Njigba responded in kind to set up the game-winning conversion.
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