The Raptors also announced on Friday that Alex English will return for his sixth season with Toronto, his eighth as an NBA assistant. English, who played 16 seasons in the NBA, is the 12th leading scorer in league history and a member of the Basketball Hall of Fame.
Iavaroni was an assistant in Phoenix, Miami and Cleveland before taking over Memphis on May 30, 2007. He was fired on Jan. 22, 2009, following a 13-26 start.
Evans, a former Denver assistant, spent two seasons with the Raptors, while Herbert was with Toronto for just one season.