 Clack was taken with the 14th pick of the seventh round in the 2008 NBA D-League Draft by the Albuquerque Thunderbirds.In 9 games during the 2007–08 NBA Development League season, he averaged 7.3 points per game.Clack played with USA Basketball Men's Junior Select Team during the 1995 Nike Hoop Summit game where he went scoreless in 8 minutes of playing time in USA's 86-77 victory against the World Select Team.