NEW YORK — A dramatic 88th minute winner from rookie Nick DeLeon gave DC United a 1-0 win over the New York Red Bulls in Major League Soccer's Eastern Conference semifinals Thursday. In the Western Conference, the Seattle Sounders go through to face the LA Galaxy after stunning Real Salt Lake 1-0 in Utah thanks to a superbly struck goal from Honduran Mario Martinez making his first league start. DC, which won the tie 2-1 on aggregate after its 1-1 draw at home Saturday, will now face the Houston Dynamo over two-legs for a place in the title-deciding MLS Cup on Dec. 1. The Sounders go into the West after three straight defeats — AP