Borchardt was selected 18th overall in the first round by the Orlando Magic in the 2002 NBA Draft but was traded to the Utah Jazz. Injury-prone in college, this continued as he sat out his rookie season. He made his Jazz debut in the 2003-04 campaign. He was dealt to the Boston Celtics as part of the largest trade in NBA history - a 13-player, 5-team deal on August 2, 2005. He was not included on Boston's roster in 2005-06 but played with them in the preseason, scoring seven points in seven games.