Duncan attended Potomac High School, in Oxon Hill, Maryland.[4] Playing at both receiver and tailback for Potomac's football team, he accumulated 2,209 yards his senior year, including 958 yards receiving and 808 yards rushing, and was named a high school All-American by Football News and the Maryland Player of the Year by the Washington Pigskin Club.[1]
Duncan played college football at Tennessee from 1979 to 1983.[5] Along with teammates Willie Gault, Anthony Hancock, Lenny Taylor and Tim McGee, he helped create the school's reputation as "Wide Receiver U."[6] He played sparingly in 1979, redshirted in 1980, played as a defensive back in 1981, and played primarily as a reserve receiver in 1982.[7] In 1983, however, he led the team in receiving with 33 catches for 640 yards and six touchdowns.[8] He caught touchdown passes of 80 yards and 57 yards in Tennessee's 41–34 win over Alabama,[9] and his 85-yard touchdown catch against Vanderbilt remains the third-longest in school history.[10] He attracted close attention from scouts for his workout performance at the 1983 Blue–Gray Football Classic.[11]
Professional football career
Duncan was selected in the first round of the 1984 NFL draft by the Cardinals.[12] Duncan's rookie year was disrupted by a contract dispute,[13] and he did not sign with the Cardinals until September 10.[14] He soon separated his shoulder, sending him to the injured reserve list.[15] In 1985, Duncan did work his way into the lineup, but caught only four passes on the season[16] and lost his role as third receiver.[17] The Cardinals released Duncan on August 18, 1986.[18] Duncan was subsequently acquired by the Cleveland Browns in the spring of 1987,[19] but he was released at the start of preseason[20] and did not appear in another NFL game.