The former Accrington skipper, who started his career with North End, returned to Deepdale in January 2012 and was handed the captain's armband by then-boss Graham Westley.
However, first-team opportunities were hard to come by for the 30-year-old last term as he made just six league starts amid a total of 23 appearances.
A club statement read: "Procter leaves the club with everyone's best wishes, having been a model professional during his 18-month stay with the Lilywhites."
- Sports & Recreation
- Employment & Career