Tight end Saubert executed the game-winning two-point play for the Seahawks.
Seattle staged a stunning comeback to overcome the Los Angeles Rams in extra time, securing their place in the postseason.
Overcoming a 30-14 deficit in the final period, the Seattle squad emerged victorious 38-37 at home, notching their fifth consecutive win.
While the Rams had become the first to earn a post-season spot earlier on game day, the Seattle team secured their place to the postseason after a two-year hiatus.
With this outcome, the Seattle now lead their division's race with a twelve and three mark, replacing the Los Angeles, who fell to the number five seed with an 11-4 record.
Quarterback Sam Darnold had two picks but regrouped to deliver two touchdown passes, culminating in the second TD to wideout Smith-Njigba in the extra period.
The Rams held a six-point lead at half-time before Walker burst through for a long scoring dash for the home side.
Los Angeles cornerback Wallace then returned Darnold's first interception for a big return, leading to a one-yard score by Corum on the ensuing snap.
In the final stanza, a scoring pass from Matthew Stafford to Nacua pushed the advantage to sixteen points, but Rashid Shaheed provided Seattle's comeback with a 58-yard return for a score.
Darnold then found AJ Barner in the end zone, and a successful two-point play sent the game into an extra period.
Although Puka Nacua scored for his second TD in overtime, Jaxon Smith-Njigba answered in kind to setup the decisive score.
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