Kaelan Michael Casey (born 28 October 2004) is an English professional footballer who plays as a defender for Leyton Orient on loan from club West Ham United.
Growing up in Thurrock, Casey joined West Ham's football academy when he was five years-old. In the 2020âÂÂ21 season, Casey made his debut appearances for the under-18s and played for West Ham in the EFL Trophy. By September 2022, Casey was playing regularly at the under-21 level with West Ham. On 31 May 2022 Casey had signed a professional contract with the club. Casey made his senior debut for West Ham United on 3 November 2022 in the UEFA Europa Conference League against FCSB, appearing as a second-half substitute for Ben Johnson, in a 3âÂÂ0 West Ham win. Casey was a member of the team which won the 2023 FA Youth Cup defeating Arsenal 5âÂÂ1 at the Emirates Stadium in April 2023. He scored West Ham's fourth goal with a header at the back post from an Oliver Scarles corner kick. He signed a new four-year contract with West Ham in August 2023.
Casey made his Premier League debut on 11 May 2024, as a late substitute for Angelo Ogbonna in a 3âÂÂ1 home win against Luton Town.
On 4 August 2025, Casey joined Championship club Swansea City on loan for the 2025âÂÂ26 season.
On 7 June 2024, Casey made his England U20 debut during a 2âÂÂ1 win over Sweden at Stadion à  RC Sesvete.
Casey cites Declan Rice as his role model. His father, Paul, told The Athletic that whilst he has always played as a centre-back he can also contribute in midfield.
Casey attended Shaw Primary Academy in South Ockendon in the borough of Thurrock in Essex. He is a West Ham United supporter and former season ticket holder.
West Ham United U18