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Irish jockey Tom O'Brien has died aged 39 after being diagnosed with cancer, the BBC Sport reported. He rode more than 1,000 winners in Britain and Ireland, won the Welsh Grand National twice and was nephew of trainer Aidan O'Brien. He was a longtime mainstay of Philip Hobbs's Minehead yard, joining as a teenager and staying until he retired in 2023, and he later joined the British Horseracing Authority stewarding team. At the Cheltenham Festival he rode two winners, and on Thyme Hill for Hobbs he won the Liverpool Hurdle in 2021 and the Kauto Star Novices' Chase in 2022. British Horseracing Authority chief executive Brant Dunshea paid tribute to him as a brilliant jockey, valued colleague and loyal friend, and a loving husband and devoted father. Hobbs said he would be missed, and that O'Brien, who leaves a wife, Hayley, and two young children, had visited the yard about three weeks earlier.