Dallas (1-3-1) was awarded the penalty kick after Toronto FC defender Marvell Wynne was called for a foul inside the penalty area. Cooper converted from the 12-yard spot by placing a shot past goalkeeper Stefan Frei into the left corner of the net.
Chad Barrett's goal in the 59th minute evened the game at 2 as Toronto FC (1-1-2) erased a two-goal deficit. Fuad Ibrahim started the scoring sequence on Barrett's goal with a cross from beyond midfield to Amado Guevara, who headed a pass to Barrett. Barrett dribbled five yards before firing a shot from 12 yards into the left corner of the net.
Toronto FC's Dwayne De Rosario scored the team's first goal in first-half stoppage time when he knocked in a shot from inside the goalie's box off of the left hand of FC Dallas goalkeeper Ray Burse that inched over the goal line.
Dallas' Drew Moor opened the scoring in the 25th minute after heading Dax McCarty's free kick into the left corner of the net.
Cooper extended the lead to 2-0 by scoring his third goal of the season in the 44th minute. David Ferreira sent a cross to Cooper, who took two steps before firing a right-footed shot from outside the penalty area into the left corner of the net.