The 29-year old helped the Sounders to a 1-0 win over Sporting Kansas City on the weekend, heading home the winning goal in stoppage time at Qwest Field.
Parke was influential in defense for the Sounders and his performance was enough to pick up the Week 10 award from the North American Soccer Reporters (NASR).
He is the first defender this season to win the prize, joining a whole bunch of goalscorers from the first nine weeks.
2011 MLS Player of the Week winners
Week 10: Jeff Parke (Seattle Sounders FC)
Week 9: Justin Braun (Chivas USA)
Week 8: Joao Plata (Toronto FC)
Week 7: Will Bruin (Houston Dynamo)
Week 6: Landon Donovan (LA Galaxy)
Week 5: Luke Rodgers (New York Red Bulls)
Week 4: David Ferreira (FC Dallas)
Week 3: Camilo (Vancouver Whitecaps)
Week 2: Javier Morales (Real Salt Lake)
Week 1: Omar Bravo (Sporting Kansas City)