Brad Sheppard, who suffered two serious concussions which led to his early retirement in 2021 at the age of 30, alleges that he suffered losses a result of negligence or a breach of contract by those he is suing. Brad Sheppard, who suffered two serious concussions which led to his early retirement in 2021 at the age of 30, alleges that he suffered losses a result of negligence or a breach of contract by those he is suing. Sport / AFL Sydney Morning Herald – Latest News