Witherspoon (hamstring) was a limited participant at practice with the Seahawks on Wednesday, John Boyle of the Seahawks' official site reports.
Witherspoon appears to have picked up a hamstring injury in Seattle's 23-20 win over the Patriots in Week 2. The cornerback's ability to practice in any capacity is a positive sign and he'll have to more chances to log a full session before Sunday's matchup with the Dolphins.