Everett John "Sonny" Grandelius (April 16, 1929 – April 25, 2008) was an American football player, coach, announcer, and executive.
He was the head coach at the University of Colorado at Boulder from 1959 to 1961, compiling a record of 20–11 (.645).
Grandelius played college football at Michigan State University from 1948 to 1950 and with the National Football League's New York Giants in 1953.