The AFL said it had not approved the arrangement.However, the agreement was signed off by Geelong's board, which was headed by the current AFL Commission chair, Craig Drummond.Mrs Brown said she found the story upsetting and believed her son would have done the same, and signed a waiver, despite his history of head injuries."I felt disgusted, absolutely disgusted that that [waiver] was allowed to go ahead," she said."How can that go ahead?"And gutted in my heart Because you know how much they want to play, right?"In a statement on Thursday night, the AFL and the AFL Players Association said it had not approved the agreement.It also said Geelong was removing it and all other clubs would be advised not to strike similar deals with "at-risk" players to exonerate themselves from future legal action.Mrs Brown's statement comes just a month after Adam Hunter's "grieving best mate" Dave Andrews penned an open letter to the AFL Commission saying it had "failed" in its duty of care to players."You have failed him," Mr Andrews wrote in the five-page letter that touched on Hunter's sacrifice for the game and pleaded for the AFL leadership to better inform its players of the CTE risk.Mr Andrews is yet to receive a response from the AFL Commission.The AFL has been contacted for comment.