Jaime Castrillon and Martin Rivero each scored while FC Dallas was down two men Sunday, elevating the Colorado Rapids to a 2-0 victory. Daniel Hernandez was sent off with a second yellow card in the 34th minute and Blas Perez joined him on the bench with a red card just 2 minutes later, leaving the Hoops with nine men for most of the match. Castrillon took advantage in the 61st minute, using a header to redirect a chipped pass from Brian Mullan past goalkeeper Kevin Hartman for the decisive goal. Rivero doubled the lead for Colorado (5-5-0) in the 75th on a shot from near the penalty spot off another pass from Mullan. Dallas fell to 3-4-3.