After a 2-year hiatus, the Lamar Hunt US Open Cup is back. The Houston Dynamo begin their run for the cup in the Third Round tonight against the Rio Grande Valley FC Toros. The Dynamo are coming off a 0-0 draw on Saturday against the Portland Timbers. The Toros have won just 2 of their 6 matches in the USL Championship this season but they are coming off a victory their last time out, 1-0 over New York Red Bulls II. RGV advanced to the Third Round of the Open Cup by winning on the road at North Carolina FC 2-1 in their inaugural match in the competition.