Tight end Saubert executed the decisive two-point play for the Seahawks.
Seattle staged a stunning comeback to overcome the Rams in extra time, securing their spot in the postseason.
Rallying from a sixteen-point hole in the fourth quarter, the Seahawks triumphed by a single point at home, notching their fifth straight win.
While the Rams had become the first to earn a playoff spot earlier on game day, the Seattle team secured their place to the play-offs after a two-year absence.
With this outcome, the Seattle now lead their division's standings with a twelve and three record, supplanting the Rams, who fell to the number five playoff position with an eleven and four record.
Signal-caller Darnold had two interceptions but recovered to deliver two touchdown passes, including the second TD to wideout Jaxon Smith-Njigba in the extra period.
The visitors held a six-point lead at the break before Kenneth Walker III burst through for a long touchdown run for Seattle.
Rams defensive back Josh Wallace then took back Darnold's initial interception for a big return, leading to a short score by Blake Corum on the ensuing snap.
In the fourth quarter, a scoring pass from Matthew Stafford to Puka Nacua extended the Rams' lead to 30-14, but Rashid Shaheed provided Seattle's comeback with a spectacular return for a score.
Darnold then connected with Barner in the endzone, and a converted two-point play sent the contest into overtime.
Although Puka Nacua raced in for his second TD in OT, Jaxon Smith-Njigba answered in kind to set up the game-winning conversion.
Lucas van der Meer is a digital strategist focused on empowering local economies with technology-driven market solutions.