Coach Mark Few and the Bulldogs counted on Heytvelt to be a major contributor in his freshman season of eligibility in 2005–06[2] as part of the supporting cast behind superstar Adam Morrison, but he missed most of the season due to a broken ankle suffered in the Maui Invitational.

[3] The best game of his career came on February 26, 2009 against Santa Clara, when he scored 29 points and grabbed 9 rebounds.

However, in what was effectively his freshman year as a player, there were several games in which he made only sporadic impact.

On June 28, 2012, Heytvelt returned to Turkey after signing a contract with Tofaş for the 2012–13 season.

On August 2, 2014, Heytvelt signed with Hitachi SunRockers of the Japanese National Basketball League.