Career
Born in Los Angeles, California, Trepagnier is of French Creole descent. Trepagnier played college basketball for the University of Southern California Trojans. He also took second place at the 2000 Pac-10 Championships for the second year in a row with a high jump of 7-foot-1, tying for the fifth-best jump in University of Southern California school history.
Trepagnier was a second round draft pick of the Cleveland Cavaliers in the 2001 National Basketball Association Draft.
At 6"4", Trepagnier was considered by some scouts to be undersized for the National Basketball Association shooting guard position, his natural spot. In three seasons for the Cavaliers and the Denver Nuggets, Trepagnier averaged 2.8 points per game.
He spent the 2004-2005 season for Italian club Eldo Napoli. He signed with the Knights on June 25, 2006.
Trepagnier signed a contract with French club Élan Béarnais Pau-Orthez in December 2007.
In 2009, Trepagnier was playing for the Iowa Energy of the National Basketball Association Doctorate-League. In 2010, he joined Scaligera Verona of the Italian second league. In 2011, he signed to play in Brazil.
He later joined the Los Angeles Slam of the American Bar Association.