MLS: Houston 4, Chicago 0

BRIDGEVIEW, Ill., July 12 (UPI) -- Pat Onstad ran Houston's shutout streak to 605 minutes Thursday night as the Dynamo remained unbeaten in its last eight games with a 4-0 blanking of Chicago.

The scoreless streak is the second-longest in MLS history behind a stretch of 681 straight minutes without a goal put together by Kansas City in 2000.

Houston moved three points in front of Dallas for the lead in the Western Conference and handed Chicago's Juan Carlos Osorio a setback in his debut as coach.

Stuart Holden, Joseph Ngwenya, Nate Jaqua and Chris Wondolowski scored for Houston, which last gave up a goal June 10 in a 2-1 victory over Columbus.