COMMERCE CITY, Colo. — Omar Cummings scored the tying goal in the 84th minute and the Colorado Rapids extended its franchise-record unbeaten streak to eight with a 1-1 draw against FC Dallas on Wednesday night.Cummings, who has four goals in his last five games, dribbled the ball inside the penalty area, where he fired a low shot past goalkeeper Ray Burse. David Ferreira scored in the 37th minute for Dallas, 3-7-5 (14 points) and seventh in the MLS Western Conference.The Rapids (5-2-6), 3-0-5 during their unbeaten stretch, bettered the previous mark of seven matches established April 10-May 27, 1999, and equaled Aug. 16-Oct. 2, 2003. Despite being dominated in the first half, Dallas grabbed the lead on Ferreira’s goal. Kenny Cooper sent a pass to Jeff Cunningham, who nudged the ball ahead to Ferreira outside the goal box, where he beat goalkeeper Matt Pickens for his second goal of the year.Colorado had several chances to break open the game before Ferreira’s goal. But Burse twice had key saves. Each team had a quality chance in the second half. Burse caught Cory Gibbs’ shot in the 55th minute, while Pickens smothered a shot in the 66th by Andre Rocha, who got behind Colorado’s defense for a breakaway.