Haas had a distinguished college career - he was a three-time first-team All-American, four-time All-ACC, two-time ACC player-of-the-year, and 2001 ACC rookie-of-the-year. During his college career, he won ten college tournaments, and in his senior year of 2004, he won the Haskins Award, the Jack Nicklaus Award, and the Ben Hogan Award. He also set an NCAA record for lowest scoring average. Haas was a member of the 2003 Walker Cup team as well as two Palmer Cup teams. He turned professional in 2004.
Haas and his father won the CVS Caremark Charity Classic in 2004, an unofficial PGA Tour event.