Cogger and Mata'utia injury update Young halfback Jack Cogger has this week undergone pelvis stabilizing surgery and repair of a sports hernia. Cogger will be sidelined for approximately 14 weeks. Meanwhile Chanel Mata’utia suffered a grade one hamstring strain at training on Wednesday. Mata’utia will be out for approximately three to four weeks. http://www.newcastleknights.com.au/news/2017/03/10/cogger_and_mata_utia.html This explains the situation with Cogger.