"Reggie Bush is one of the great football players in the history of USC," Haden said.
Bush voluntarily returned his trophy to the trust after he faced criticism around college football.
The Heisman website does not list a recipient of the 2005 trophy.
Haden said that Bush's legacy continues to attract players to USC.
"Kids even today who come here and play football still remember they were first introduced to USC through Matt Leinart and Reggie Bush and those teams that were so successful during that Pete Carroll run," Haden said.