- Much has been done in recent years to assess players and enforce time out periods for players suffering from concussion.
Former Wales and British and Irish Lions captain Sam Warburton believes top level rugby players are at risk of death unless more is done to make the game safer.
Warburton retired aged 29 last year, beaten down by a long list of injuries, including a broken jaw, a plate inserted into his eye socket, a hamstring torn off the bone and damaged knee ligaments.
However, he fears even worse could happen unless rules are changed.
"If something isn't done soon, then a professional player will die during a game, in front of the TV cameras, and only then will people throw up their hands and demand that steps must be taken," Warburton told The Times.
Capped 74 times by his country and captain of two Lions tours, Warburton admitted to "not enjoying 80 percent of his career" such was the physical and mental toll it put on him.