What happened: Drew Lock will start at quarterback on Sunday against Arizona as Sam Darnold recovers from a quad injury. Lock previously took over the offense earlier this season when Darnold was sidelined.

Why it matters: The divisional meeting comes on a short week following a 34-17 loss to the Chicago Bears on Monday. Lock will make his third appearance of the campaign as Seattle manages Darnold's second injury absence of the season.

What to watch: Lock leads the starting unit into Sunday's game against Arizona while Darnold begins rehabilitation on his quad.