Receiver Saubert executed the game-winning two-point conversion for the Seahawks.
Seattle staged a remarkable comeback to defeat the Rams in extra time, securing their spot in the postseason.
Overcoming a sixteen-point deficit in the fourth quarter, the Seahawks emerged victorious 38-37 at home, registering their fifth straight victory.
While the Rams had become the first to earn a playoff spot earlier on game day, the Seahawks secured their place to the play-offs after a two-year hiatus.
With this outcome, the Seahawks have taken over their Conference standings with a twelve and three record, replacing the Rams, who fell to the number five seed with an eleven and four record.
Signal-caller Sam Darnold threw two picks but regrouped to make two scoring throws, including the tying TD to star receiver Jaxon Smith-Njigba in the extra period.
The visitors held a six-point lead at half-time before Kenneth Walker III burst through for a 55-yard scoring dash for the home side.
Rams defensive back Josh Wallace then returned Darnold's first interception for 56 yards, leading to a one-yard touchdown by Corum on the ensuing snap.
In the fourth quarter, a touchdown from Matthew Stafford to Nacua pushed the Rams' lead to 30-14, but Shaheed ignited the hope with a 58-yard punt return.
Darnold then connected with Barner in the endzone, and a successful two-point play sent the contest into an extra period.
Although Nacua raced in for his another TD in overtime, Jaxon Smith-Njigba answered in kind to setup the decisive conversion.
