 Krupnik returned the New York Red Bulls, known as the MetroStars during his first stint with the club, in July 2009.Krupnik made his MLS debut in a 4–0 loss to Colorado Rapids on July 25, 2009, and played in three games for the team before returning to Israel in November, when he was signed for a second stint with Maccabi Netanya.In 2005, Lev Kirshner picked Krupnik for the United States squad for the 2005 Maccabiah Games, an international Jewish athletic event similar to the Olympics held in Israel every four years.