Receiver Saubert made the game-winning two-point play for Seattle.
The Seattle Seahawks staged a remarkable fightback to overcome the Rams in extra time, clinching their place in the postseason.
Overcoming a 30-14 hole in the fourth quarter, the Seahawks emerged victorious by a single point at home, registering their fifth straight victory.
While the Rams had already secured a playoff spot earlier on Sunday, the Seahawks booked their return to the play-offs after a 24-month absence.
With this result, the Seattle now lead their Conference standings with a twelve and three mark, supplanting the Los Angeles, who fell to the number five seed with an eleven and four standing.
Quarterback Darnold had two interceptions but recovered to make two touchdown passes, including the second score to wideout Smith-Njigba in overtime.
The visitors held a 13-7 lead at half-time before Kenneth Walker III burst through for a long touchdown run for Seattle.
Los Angeles defensive back Josh 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 extended the Rams' lead to sixteen points, but Shaheed ignited the comeback with a spectacular punt return.
Darnold then connected with Barner in the end zone, and a successful two-point play forced the contest into an extra period.
Although Nacua scored for his another TD in OT, Jaxon Smith-Njigba responded in kind to set up the game-winning score.
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