Luke made 68 NRL appearances for Souths in the 2009, 2010 and 2011 seasons. In none of those seasons did Souths qualify for the finals series. He represented New Zealand in the 2009, 2010 and 2011 Four Nations tournaments, playing off the substitutes bench for the Kiwis' win of the 2010 edition. For the 2010 Anzac Test, Luke was selected to play for New Zealand at hooker in their loss against Australia. Luke's 2011 Four Nations tournament ended in controversy after he was criticised for a series of cynical tackles on opposing players. Luke admitted that in a match against England, he had attempted to break the leg of Rangi Chase, England's New Zealand-born half-back.