Oliver Joseph Casey (born 14 October 2000), sometimes known as Olly Casey, is an English professional footballer who plays as a centre-back for Leeds United.
Born in Leeds, Casey came through the academy at Leeds United. After impressing for Leeds’ under 18s and under 23s, he signed a two-year professional contract with Leeds United in November 2018, making his professional debut on 7 December 2019 as an 85th-minute substitute for Mateusz Klich in a 2–0 victory at Huddersfield Town. He signed a new three-year contract with the club on 14 July 2020.
His first start of the 2020–21 season came on 16 September 2020 for Premier League Leeds in a 1–1 draw against League One side Hull City in the EFL Cup (Hull went on to win 9–8 on penalties).