For eight innings, the New York Mets made embarrassing mistakes, squandered chances and looked almost totally adrift. That all got wiped away with a four-run bottom of the ninth. Nieuwenhuis hit a three-run homer after Marlon Byrd got it started with a leadoff shot and the Mets salvaged what had been shaping up as another sorry afternoon, startling the Chicago Cubs 4-3 on Sunday.