Receiver Saubert executed the game-winning two-point play for the Seahawks.
Seattle staged a stunning fightback to defeat the Rams in extra time, securing their place in the NFL play-offs.
Rallying from a 30-14 deficit in the fourth quarter, the Seattle squad triumphed 38-37 at home, registering their fifth consecutive win.
While the Rams had already secured a playoff berth earlier on Sunday, the Seattle team booked their return to the postseason after a two-year absence.
With this result, the Seattle now lead their division's race with a twelve and three record, supplanting the Rams, who fell to the fifth seed with an eleven and four standing.
Signal-caller Sam Darnold had two interceptions but recovered to deliver two scoring throws, including the tying score to wideout Jaxon Smith-Njigba in overtime.
The visitors held a 13-7 advantage at the break before Walker burst through for a long touchdown run for the home side.
Rams defensive back Wallace then took back Darnold's first pick for 56 yards, leading to a one-yard score by Blake Corum on the next play.
In the final stanza, a scoring pass from Stafford to Puka Nacua pushed the advantage to sixteen points, but Shaheed provided the comeback with a spectacular return for a score.
Darnold then connected with Barner in the end zone, and a successful conversion forced the contest into an extra period.
Although Puka Nacua raced in for his second touchdown in overtime, Jaxon Smith-Njigba answered in kind to set up the decisive score.
Maya Chen is a gaming industry analyst and writer specializing in online casinos, with expertise in Canadian gaming regulations and player trends.