While there the Bulldogs offered him a full scholarship which he has apparently accepted - terminating his commitment to the Blue Devils in the process.
"It's just a verbal. I'm still looking at other schools. My top three schools are Duke, Georgia and UCLA," said Cox in an interview with Bruin Report Online.
As a junior, Cox was 237-for-373 for 3,983 yards and threw 43 touchdowns.
Duke is expected to re-open their recruiting at the quarterback position in light of these recent developments.