 Initially a promising gymnast, Krupnik was spotted playing football with some friends by the manager of the San Francisco Vikings youth team, and the youngster quickly changed sports.Krupnik attended and was the team captain of George Washington High School, graduating in 1997, and played four years of college soccer at the University of California, Berkeley, majoring in social welfare.Krupnik was also strong academically, and was on the Dean's Honor List in Fall of 2000.