Receiver Saubert executed the game-winning two-point conversion for Seattle.
The Seattle Seahawks engineered a stunning comeback to defeat the Rams in overtime, clinching their place in the postseason.
Rallying from a 30-14 deficit in the fourth quarter, the Seahawks emerged victorious 38-37 at home, notching their fifth straight win.
While the Los Angeles had become the first to earn a post-season spot earlier on game day, the Seattle team secured their place to the play-offs after a 24-month hiatus.
With this result, the Seahawks have taken over their Conference race with a 12-3 mark, replacing the Rams, who dropped to the number five seed with an eleven and four standing.
Quarterback Darnold threw two picks but regrouped to make two scoring throws, including the second score to wideout Jaxon Smith-Njigba in overtime.
The visitors held a six-point lead at the break before Kenneth Walker III broke free for a long touchdown run for the home side.
Rams defensive back Josh Wallace then took back Darnold's first interception for a big return, leading to a one-yard score by Corum on the ensuing snap.
In the fourth quarter, a scoring pass from Stafford to Puka Nacua pushed the advantage to 30-14, but Shaheed provided the comeback with a 58-yard punt return.
Darnold then connected with AJ Barner in the end zone, and a converted two-point play sent the game into an extra period.
Although Nacua raced in for his another touchdown in OT, Smith-Njigba answered in kind to setup the game-winning score.
Elara Vance is a Toronto-based journalist and cultural critic with a passion for exploring the intersection of politics and everyday life in Canada.