Another rugby player has been forced into early retirement due to concussion.
Former Chiefs prop Nathan White has called time on his professional career based on medical advice.
White suffered a concussion while playing for Connacht in March and hasn't played since.
He made his international debut for Ireland last year and played in all five of their Rugby World Cup games and in the Six Nations that followed.
"While it's disappointing to finish this way I can look back at my career with a lot of pride," White told the Irish Rugby Football Union website.
"To have the chance to represent Ireland at the World Cup was an extremely special time in my life and something I will cherish forever."