Receiver Saubert made the game-winning two-point play for Seattle.
The Seattle Seahawks staged a stunning fightback to overcome the Rams in overtime, clinching their spot in the postseason.
Overcoming a 30-14 hole in the final period, the Seahawks emerged victorious 38-37 at home, registering their fifth straight victory.
While the Los Angeles had become the first to earn a post-season spot earlier on Sunday, the Seahawks secured their place to the postseason after a two-year hiatus.
With this outcome, the Seattle have taken over their Conference standings with a twelve and three record, replacing the Rams, who fell to the fifth seed with an 11-4 standing.
Quarterback Sam Darnold had two picks but regrouped to deliver two scoring throws, culminating in the tying score to wideout Smith-Njigba in overtime.
The visitors held a 13-7 lead at the break before Walker broke free for a 55-yard scoring dash for the home side.
Los Angeles cornerback Josh Wallace then returned Darnold's first interception for 56 yards, leading to a short touchdown by Corum on the ensuing snap.
In the fourth quarter, a touchdown from Matthew Stafford to Puka Nacua extended the Rams' lead to 30-14, but Shaheed provided Seattle's comeback with a spectacular punt return.
Darnold then connected with AJ Barner in the endzone, and a converted two-point play sent the contest into overtime.
Although Nacua raced in for his another TD in OT, Jaxon Smith-Njigba responded in kind to setup the game-winning score.
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