 Krupnik was drafted with the 69th pick of the 2002 MLS SuperDraft by the MetroStars, but did not make the squad, and instead spent the 2002 season with the Des Moines Menace of the Premier Development League.He was signed by the MetroStars late in the season, again without seeing any first-team action, and was then released on free transfer to the Wilmington Hammerheads.After winning the 2003 championship with Wilmington, Krupnik was signed by Charleston Battery.