Tight end Saubert executed the decisive two-point play for the Seahawks.
Seattle engineered a stunning comeback to overcome the Los Angeles Rams in overtime, securing their place in the NFL play-offs.
Overcoming a sixteen-point deficit in the fourth quarter, the Seahawks emerged victorious 38-37 at home, notching their fifth straight win.
While the Rams had become the first to earn a playoff spot earlier on Sunday, the Seattle team secured their place to the play-offs after a 24-month hiatus.
With this result, the Seahawks have taken over their division's standings with a twelve and three record, supplanting the Rams, who fell to the fifth playoff position with an eleven and four standing.
Quarterback Sam Darnold had two interceptions but recovered to deliver two scoring throws, culminating in the tying score to star receiver Smith-Njigba in overtime.
The visitors held a 13-7 lead at the break before Kenneth Walker III burst through for a 55-yard touchdown run for the home side.
Los Angeles defensive back Wallace then took back Darnold's first interception for 56 yards, setting up a one-yard score by Corum on the next play.
In the final stanza, a scoring pass from Matthew Stafford to Nacua extended the Rams' lead to 30-14, but Shaheed ignited the comeback with a 58-yard punt return.
Darnold then found AJ Barner in the endzone, and a converted two-point play sent the contest into an extra period.
Although Puka Nacua raced in for his another touchdown in OT, Jaxon Smith-Njigba answered in kind to set up the decisive score.