Receiver Eric Saubert made the game-winning two-point conversion for Seattle.
Seattle staged a stunning comeback to defeat the Los Angeles Rams in overtime, clinching their spot in the postseason.
Overcoming a 30-14 deficit in the final period, the Seattle squad triumphed by a single point at home, notching their fifth straight win.
While the Rams had become the first to earn a post-season spot earlier on game day, the Seahawks booked their return to the play-offs after a two-year hiatus.
With this result, the Seattle have taken over their division's race with a twelve and three mark, replacing the Rams, who fell to the fifth seed with an eleven and four record.
Quarterback Sam Darnold threw two interceptions but recovered to make two touchdown passes, including the tying score to star receiver Jaxon Smith-Njigba in overtime.
The visitors held a six-point lead at the break before Kenneth Walker III burst through for a 55-yard touchdown run for the home side.
Rams defensive back Wallace then returned Darnold's first interception for 56 yards, leading to a one-yard touchdown by Blake Corum on the next play.
In the final stanza, a scoring pass from Matthew Stafford to Puka Nacua pushed the advantage to sixteen points, but Shaheed ignited the hope with a 58-yard return for a score.
Darnold then found AJ Barner in the endzone, and a converted conversion sent the contest into an extra period.
Although Puka Nacua scored for his second touchdown in OT, Smith-Njigba responded in kind to setup the game-winning score.
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