Why should there be a disclaimer? You surely cannot have a contract indemnifying an employer against workplace injuries. Imo he is entitled to sue for a shortened career but he should sue the NRL, not his club, and they should have an injury fund somewhere just for this. If they haven't maybe its time to start one!
Employers need to take steps to ensure the safety of their workplace, which is damn near impossible for professional sports. You can't indemnify for this but nor can the employer be blamed for not reducing the already inherent risks. Thus why Taniela Tuiaki & Simon Dwyer got f-all and McCraken had to sue Kearney.
But also with work safety comes having rehabilitation and return to work plans for injured players, especially so when it comes to concussion as the NFL & WWE have proven. You can't necessarily sue for getting injured, but you can if you are forced to go back to work and either aggravate or prematurely reinjure, or misdiagnosed under some circumstances, which leads to the disclaimer. It probably wouldn't be completely legally standing but it gets both parties on same page for what is expected, especially when it comes to head injuries
My point was I am amazed that the professional bodies, players associations and teams haven't put together as many safeguards as possible. My middle question about regular testing was legit, does the NRL have mandatory testing for brain injuries?