When the Herald visited the second Runit League Auckland trial night in May, three of eight competitors were forced to retire with injures – two of whom showed signs of a concussion. Photo / Mike ScottWhen the Herald visited the second Runit League Auckland trial night in May, three of eight competitors were forced to retire with injures – two of whom showed signs of a concussion. Photo / Mike Scott

Ryan Satterthwaite, 19, died after sustaining a head injury in a copycat "run it straight" game in Palmerston North.Ryan Satterthwaite, 19, died after sustaining a head injury in a copycat “run it straight” game in Palmerston North.

Former NRL veteran and Kiwis representative Kevin Proctor suffered a serious head injury and an apparent seizure after a collision during a "run it straight" final in Dubai in June. Photo / KickFormer NRL veteran and Kiwis representative Kevin Proctor suffered a serious head injury and an apparent seizure after a collision during a “run it straight” final in Dubai in June. Photo / Kick