Atlanta Taking Over Houston.
Two minutes later, an open Brandon Vazquez in front of goal got on the end of Dion Pereiras deflected cross and easily headed in his fourth goal of the season.
Martinez continued his torrid pace with his ninth goal in his last six games, extending the Five Stripes lead to 3-0 on the hour mark.
The reigning MLS goals king latched onto a Gressel cross and flicked in from eight yards before being hammered by Dynamo goalkeeper Tyler Deric, who was late off his line to challenge.
A minute before receiving his marching orders, Elis served what should have been the opening goal on a platter, playing to an open Marlon Hairston at the edge of the six-yard box.