Lockett (illness) wasn't activated from the reserve/COVID-19 list and won't be available for Tuesday's game against the Rams, John Boyle of the Seahawks' official site reports.
As a vaccinated player, Lockett is eligible to rejoin the Seahawks as soon as he's asymptomatic of the virus, but he's apparently still in recovery mode after testing positive for the virus Thursday. The Seahawks elevated wideout Cody Thompson as a replacement for Lockett in Week 15, but Freddie Swaim, Dee Eskridge and Penny Hart are likelier candidates to pick up the available reps at receiver alongside regular starter DK Metcalf.