An explosive hooker, Cook joined the Rabbitohs in October of 2015 and went on to represent the Rabbitohs 17 times in 2016. He made 462 tackles, 15 offloads and was handy with his boot – kicking seven goals and 21 times in open play for 554 kick metres.
Rabbitohs coach Michael Maguire was happy with Cook's decision to remain in the Red & Green until the end of season 2019. Maguire pointed to Cook's professionalism and growth as a football player as signs that a big future lies ahead for Damien Cook.