Shaheed (knee) didn't participate at the Seahawks' practice Thursday, John Boyle of the team's official site reports.
Shaheed has now missed back-to-back practices to open the week as he continues to work his way back from the knee injury that forced him to miss the team's Week 8 loss to Chicago. The wide receiver's chances to play Sunday versus Arizona seem thin, so Tory Horton could serve as the team's No. 3 option at wide receiver again in Week 9.