Max Duffy,pictured here enjoying his first win for Fremantle in 2014,is a former Docker.Credit:Getty Images
Duffy punts for the University of Kentucky and Roy for the University of Houston.
"I've got to pinch myself,"Roy told theHouston Chronicle.
"I still can't believe it's happened."
The lone American nominated for the top punting prize is Syracuse University's Sterling Hofrichter.
Australian punters have won the coveted Ray Guy Award five of the last six years and the honour has been a launching pad into the NFL.
The 200cm tall Roy is a former ice cream salesman from Bunyip,Victoria who proved his massive boot by winning a longest kick competition at the 2015 AFL grand final with a 73m torpedo.
Former Sydney Swans junior Michael Dickson won the Ray Guy in 2017,was snapped up by the Seattle Seahawks in the NFL draft and as a rookie sensation last year received All-Pro and Pro Bowl honours.