Robert Joseph Duffy (born September 26, 1940) is a retired American professional basketball player and college coach.

He played college basketball at Colgate University, and was selected as the 10th overall pick in the 1962 NBA draft.

He graduated as the leading scorer in school history, and his record 1,591 points stood for 19 years.

He eventually became the head coach of his alma mater and compiled an overall record of 25–43 in three seasons.

Conference tournament champion Source[3] # denotes interim head coach