The player is alleged to have provided a breath sample almost three times the drink-driving limit in England after reports of a two-vehicle collision in Hethersett, near Norwich.
As per the BBC, Norwich say they are dealing with the matter internally ‘in accordance with their own disciplinary procedures’, while 32-year-old Duffy is required to appear before magistrates on July 2.
A spokesperson for Norfolk Police said: “Police were called to Queen’s Road, Hethersett, 21:05, on Monday 6 May, following reports of a two-vehicle collision.