López reached the postseason that year with Houston. In the 1986 National League Championship Series, he pitched scoreless innings in Game Two, but he was the losing pitcher in Game Six when the New York Mets won the series. López pitched the fourteenth through sixteenth innings and surrendered the go ahead run twice. During spring training before the 1987 season, López was arrested in Florida on charges of driving while intoxicated and driving with a suspended license. He earned his final major league save on May 12, 1987. He finished his MLB career with a 62–36 win-loss record, 93 saves and a 3.56 earned run average. López's career save total was the highest among Mexican pitchers in MLB until Joakim Soria surpassed the mark in 2010.