[1] Craig attended college at the University of North Carolina Wilmington where he played on the men's basketball team.

Callahan gained notoriety during his time at UNCW as he helped lead the team into 3 NCAA Tournaments (1999, 2002, 2003).

[2] After graduating from college with a Finance Degree, he played professional basketball in the Czech Republic from 2003 to 2006, and was named Most Valuable Player of the NBL in 2006.

A vital addition to the team, Callahan was one of the league's top scorers averaging over 17 points, and 6.9 rebounds a game.

During the summer of 2011 he signed a contract with New Basket Brindisi, basketball team which play the second Italian national league.