Corey Ashe and Dominic Oduro scored the goals and goalkeeper Tally Hall posted a shutout in his first Dynamo start as Houston advanced to a quarterfinal meeting with Charleston, a USL-1 team that has knocked it out of the Open Cup the past two competitions.
After more than an hour of goalless play, Ashe tucked away a rebound in the 71st minute when Austin goalie Sam Reynolds tipped John Michael Hayden's free kick onto the crossbar with a spectacular save. Ashe nodded the ball into the net for his first goal of the season.
Oduro got on the board in the 90th minute by converting a feed from Ashe to tally his first goal since being acquired by Houston last month.
Hayden and Erik Ustruck played their first competitive matches this season for the Dynamo and U.S. under-20 midfielder Danny Cruz, just back from a national team trip to Egypt, played the full 90 minutes. Ustruck will be joining Austin on loan for the rest of the USL season.
Houston plays the Battery next Tuesday in Charleston, S.C. for a place in the semifinals.
Austin (USL-1) 0, Houston (MLS) 2
July 1 in Austin
Goals: Ashe 71, Oduro 1 (Ashe) 90
Austin -- Reynolds, Alcala, Allen (Holmes 63), Bernard, Yohance (Adams 80), Evans, Harwell (Tapp 70), Callahan, Caugherty, Brown, Johnson.
Houston -- Hall, Chabala, Boswell, James, Mullan (Ashe 46), Hayden, Mulrooney (Cameron 46), Ustruck, Cruz, Oduro, Akinbiyi (Kamara 80).
Referee: Jeremy Vehar