He was selected by the Denver Nuggets in the fifth round[1] of the 1982 NBA draft (the team's fourth pick that year).
[2] In 1985 Duffy's childhood friend, San Francisco 49ers legend Ronnie Lott helped him sign his first client, Cleveland Browns receiver Webster Slaughter.
Duffy founded Walnut Creek based BDA Sports Management.
BDA represents stars such as Yao Ming, Steve Nash, Joakim Noah, Rajon Rondo, Luka Dončić.
[3][4][5][6][7] Duffy lives in the Bay Area, in Northern California with his wife and five children.