Dennis Duncan (born January 24, 1945) is a former all-star Canadian Football League running back.After playing college football at Northwestern State University he joined the Montreal Alouettes in 1968 and rushed for 429 yards in his rookie season. The next season was his best in the CFL, with 1037 yards and an eastern All-Star selection.Duncan's final year in Montreal was good, rushing for 823 yards and catching another 399 yards, but 1970 will always be remembered infamously.