Tight end Eric Saubert executed the decisive two-point conversion for Seattle.
Seattle staged a remarkable fightback to overcome the Rams in extra time, securing their spot in the postseason.
Rallying from a sixteen-point deficit in the final period, the Seahawks emerged victorious by a single point at home, notching their fifth consecutive win.
While the Rams had already secured a post-season spot earlier on game day, the Seattle team booked their return to the play-offs after a 24-month absence.
With this outcome, the Seattle now lead their Conference race with a 12-3 mark, replacing the Los Angeles, who dropped to the number five playoff position with an eleven and four standing.
Quarterback Sam Darnold had two picks but recovered to make two touchdown passes, culminating in the tying score to wideout Jaxon Smith-Njigba in overtime.
The visitors held a 13-7 advantage at the break before Kenneth Walker III burst through for a long scoring dash for the home side.
Rams defensive back Wallace then returned Darnold's first pick for a big return, setting up a one-yard touchdown by Blake Corum on the next play.
In the final stanza, a touchdown from Stafford to Nacua pushed the Rams' lead to sixteen points, but Rashid Shaheed ignited the comeback with a 58-yard punt return.
Darnold then connected with Barner in the endzone, and a successful conversion sent the game into overtime.
Although Puka Nacua raced in for his another TD in overtime, Jaxon Smith-Njigba responded in kind to setup the game-winning conversion.
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