Roberts, who coaches the south Wales-based Dragons Disabled Swimming Club, has a gruelling training regime which means 16 hours a week in the pool and regular gym sessions.
Wales prop Rhys Thomas is likely to be on tour in South Africa, while out of contract players such as Michael Owen could have left the Dragons by then.
But, in his two years since arriving from Catalans Dragons, the 47-year-old former full-back from Parramatta, New South Wales, has inevitably suffered in comparison to his immediate predecessors - fellow Aussies Ian Millward and Daniel Anderson.