COLUMBUS, OH --Emilio Renteria scored a gift goal in the first half and William Hesmer had his second straight shutout and eighth of the season as the Columbus Crew defeated Houston 3-0 on Saturday in Crew Stadium. Andy Iro scored in the 84th minute and Leandre Griffit, two minutes into his MLS debut, added another in the 90th. Columbus (10-3-4) is first Eastern Conference. Houston (5-8-4) is 0-4-3 in the past seven games. Renteria took advantage of a blunder by Houston backup goalkeeper Tally Hall in the 34th minute. Hall backpedaled as he tried to field a ball outside the penalty area and fell. Renteria picked up the loose ball and scored easily. Houston defender Bobby Boswell received a second yellow card with 18 minutes left.