Dennis was born on July 24, 1952 in Des Moines, Iowa to Robert and Agnes (Lawler) Duffy.
He graduated from Washington State University and was an avid Cougars fan. Dennis loved spending time with his family and friends, whether it be watching the Cubs or Raiders, playing cards, or shooting a round of golf.
Dennis will be dearly missed by his siblings, Agnes, Michael, Paul, Sean and Margaret, and his numerous nieces, nephews and friends.
A Celebration of Life for Dennis will be held next May. The date and location will be announced at a later date. Memorials can be made in Dennis’ name to the WSU Athletic foundation, Pullman WA. Cremation arrangements are under the direction of Lemley Chapel, Sedro-Woolley.