What happened: Head coach Mike Macdonald confirmed the quarterback change Monday on Seattle Sports 710 ESPN. Darnold is sidelined by a quadriceps injury, while Lock sustained an oblique injury during Sunday's 17-3 victory over Arizona.

Why it matters: Seattle sits at 5-4 and holds the eighth seed in the NFC playoff picture following its Week 9 victory. Handing the starting role to Lock tests the Seahawks' quarterback depth against a 4-5 Las Vegas squad trying to snap a skid.

By the numbers: Sam Darnold has completed 127 of 211 passes for 1,478 yards, 10 touchdowns, and nine interceptions in 2026 through seven games.

What to watch: Seattle travels to Las Vegas for Week 10, with practice participation reports set to track Lock's oblique recovery throughout the week.

Sources