Receiver Saubert made the decisive two-point conversion for the Seahawks.
Seattle engineered a remarkable comeback to overcome the Rams in extra time, securing their spot in the NFL play-offs.
Rallying from a sixteen-point deficit in the final period, the Seahawks emerged victorious 38-37 at home, registering their fifth consecutive win.
While the Rams had become the first to earn a playoff spot earlier on Sunday, the Seahawks secured their place to the play-offs after a two-year absence.
With this outcome, the Seattle have taken over their Conference standings with a twelve and three record, supplanting the Los Angeles, who dropped to the number five seed with an 11-4 record.
Quarterback Darnold had two picks but regrouped to make two scoring throws, culminating in the tying TD to star receiver Jaxon Smith-Njigba in overtime.
The Rams held a six-point lead at half-time before Walker broke free for a long scoring dash for the home side.
Rams cornerback Wallace then took back Darnold's initial interception for a big return, leading to a one-yard score by Corum on the ensuing snap.
In the final stanza, a touchdown from Matthew Stafford to Puka Nacua pushed the advantage to sixteen points, but Shaheed provided the comeback with a spectacular punt return.
Darnold then found AJ Barner in the endzone, and a converted two-point play forced the contest into overtime.
Although Nacua scored for his another touchdown in overtime, Smith-Njigba answered in kind to set up the decisive conversion.
Maya Chen is a journalist and blogger with a passion for storytelling and community-focused reporting, covering diverse topics from local news to global trends.