Receiver Saubert made the game-winning two-point conversion for the Seahawks.
The Seattle Seahawks engineered a stunning fightback to overcome the Rams in extra time, securing their place in the postseason.
Rallying from a sixteen-point hole in the final period, the Seattle squad emerged victorious 38-37 at home, notching their fifth straight victory.
While the Rams had become the first to earn a post-season spot earlier on game day, the Seahawks booked their return to the postseason after a 24-month hiatus.
With this result, the Seattle now lead their division's standings with a 12-3 record, supplanting the Rams, who dropped to the number five playoff position with an 11-4 standing.
Signal-caller Sam Darnold threw two picks but recovered to deliver two scoring throws, culminating in the second score to wideout Jaxon Smith-Njigba in overtime.
The visitors held a 13-7 lead at half-time before Kenneth Walker III broke free for a 55-yard touchdown run for Seattle.
Los Angeles defensive back Wallace then took back Darnold's first interception for 56 yards, leading to a short touchdown by Blake Corum on the next play.
In the fourth quarter, a touchdown from Stafford to Nacua pushed the Rams' lead to sixteen points, but Shaheed ignited Seattle's hope with a 58-yard punt return.
Darnold then found AJ Barner in the endzone, and a converted two-point play sent the game into an extra period.
Although Nacua scored for his second TD in overtime, Smith-Njigba responded in kind to set up the decisive conversion.
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