Complex sentence: In 1980, Spurrier was hired to be the offensive coordinator at Duke University by head coach Red Wilson, who had been impressed by Spurrier's coaching abilities the previous season when Georgia Tech had upset Wilson's Duke squad.
Split into simpler sentences: In 1980, Spurrier was hired to be the offensive coordinator at Duke University under head coach Red Wilson. Wilson had been impressed by Spurrier's coaching abilities the previous season when Georgia Tech had upset Wilson's Duke squad.