Oliver Harry Hayes-Brown (born 28 April 2000) is an Australian sportsman who currently plays Australian rules football with the Richmond Football Club. He previously played basketball, playing one season of college basketball for the UC Riverside Highlanders before spending two seasons as a development player with the Perth Wildcats of the National Basketball League (NBL). In 2023, he changed codes and joined the Richmond Football Club of the Australian Football League (AFL) as a category B rookie.
Hayes-Brown was born in London while his parents were both working there. One year later, the family moved to Hong Kong, where he lived for roughly five years. After moving to Melbourne, Victoria, he played under-12s football for the Mount Eliza Redlegs for a year, and then eventually had to stop because of his basketball commitments. He played basketball for the Dandenong Rangers as a junior and was a member of an Australian U19 national team. He attended Peninsula Grammar.
Hayes-Brown played in the South East Australian Basketball League (SEABL) in 2017 with the Frankston Blues and in 2018 with the Dandenong Rangers. In 2019, he played for the Rangers in the NBL1 during the league's inaugural season.
After redshirting the 2019âÂÂ20 season, Hayes-Brown made his college basketball debut for the UC Riverside Highlanders in the 2020âÂÂ21 season. In 20 games, he averaged 3.2 points and 3.6 rebounds per game.
After returning to Australia, Hayes-Brown played for the Dandenong Rangers in the NBL1 South during the 2021 NBL1 season, where he averaged 19.6 points and 13.3 rebounds in 12 games.
In October 2021, Hayes-Brown signed with the Perth Wildcats of the National Basketball League (NBL) as a development player for two seasons. In the 2021âÂÂ22 NBL season, he totalled eight points and twelve rebounds in eight games.
Hayes-Brown joined the Willetton Tigers of the NBL1 West for the 2022 season. In seven games, he averaged 23.0 points, 15.1 rebounds, 2.1 assists and 1.4 steals per game.
Hayes-Brown re-joined the Wildcats for the 2022âÂÂ23 NBL season as a development player. He totalled eight points and seven rebounds in five games.
Hayes-Brown joined the Keilor Thunder for the 2023 NBL1 South season. In 22 games, he averaged 14.59 points, 8.23 rebounds and 1.09 assists per game.
On 6 September 2023, Hayes-Brown signed with the Richmond Football Club in the Australian Football League (AFL) as a category B rookie.
He made his first appearance for Richmond in a Victorian Football League (VFL) practice match against on 9 March 2024, wearing the number 39 and kicking one goal.
Richmond allowed him to develop his ruck craft at the local level instead of the VFL, initially playing in the Victorian Amateur Football Association (VAFA) for Old Ivanhoe in the Premier B division. In June 2024, he was recalled from the VAFA and debuted for Richmond's VFL side against .
In 2025, he played 16 VFL games, including a Round 14 contest against the Northern Bullants where he had 26 disposals and 36 hitouts.
Hayes-Brown's younger sister, Phoebe, has special needs and is non-verbal, with his family all learning sign language.