Tuhia he tomokanga mō tēnei wāhanga - I te 1 o Hōngongoi 2009, i hainatia e ia tētahi kirimana e whā tau, $6.8 miriona ki te Tampa Bay Lightning. I te Hōngongoi 19, 2010, i whakawhitihia a Walker ki te Philadelphia Flyers, me te kowhiringa tuawha o te 2011 NHL Entry Draft
, hei utu mo te kaikawe a Simon Gagne.