Carlton given permission to place Nick Duigan on long-term injury list CARLTON has been given permission to place Nick Duigan on its long term injury list, paving the way for the defender's retirement. Duigan, 29, told the Blues last week of his plans after struggling to overcome knee and ankle problems. "It's been a difficult decision, but it's certainly the right one for both myself and the club," Duigan told the club's website. Carlton football operations boss Andrew McKay said the club was aware of his injury problems. Nick has had an ongoing knee condition ... unfortunately the doctors have now made it very clear that his knee will not cope with another year at AFL level.