Receiver Saubert executed the decisive two-point conversion for Seattle.
The Seattle Seahawks staged a remarkable fightback to overcome the Rams in extra time, securing their place in the NFL play-offs.
Overcoming a 30-14 hole in the final period, the Seattle squad triumphed by a single point at home, registering their fifth consecutive victory.
While the Rams had become the first to earn a post-season berth earlier on game day, the Seattle team booked their return to the postseason after a 24-month absence.
With this result, the Seattle now lead their Conference race with a twelve and three mark, supplanting the Los Angeles, who dropped to the number five seed with an 11-4 standing.
Signal-caller Darnold had two picks but recovered to make two scoring throws, including the second score to star receiver Jaxon Smith-Njigba in overtime.
The visitors held a six-point advantage at the break before Kenneth Walker III broke free for a long touchdown run for Seattle.
Los Angeles cornerback Josh Wallace then took back Darnold's initial pick for a big return, leading to a short touchdown by Blake Corum on the next play.
In the fourth quarter, a touchdown from Matthew Stafford to Nacua extended the advantage to sixteen points, but Rashid Shaheed ignited Seattle's hope with a 58-yard return for a score.
Darnold then found Barner in the end zone, and a converted two-point play forced the contest into an extra period.
Although Puka Nacua raced in for his another TD in overtime, Jaxon Smith-Njigba answered in kind to setup the decisive conversion.
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