Witherspoon (foot) was listed as a DNP on Wednesday's injury report, John Boyle of the Seahawks' official site reports.
Witherspoon logged five tackles (four solo) during the Seahawks' Week 8 loss to the Bills, but he appears to have picked up a foot injury in the process. He'll have two more opportunities this week to practice in at least a limited capacity ahead of Sunday's NFC West clash against the Rams.