Lock (elbow) was a limited practice participant Thursday, John Boyle of the Seahawks' official site reports.
Lock has now been limited in each of Seattle's past five practice sessions, though he was able to suit up last Thursday against Denver. It seems likely that he'll be active again for this Sunday's matchup against Kansas City, though Seattle's practice report Friday should provide more clarity in that regard. If Lock does indeed suit up Sunday, he'll again work as Sam Darnold's backup.