Keenan Appiah-Forson was reported by Devon Live as appearing for Exeter City as a triallist against Tiverton Town in a friendly in July 2024. On West Ham United’s books since the age of fourteen, he became a scholar/trainee in 2018 and made his first team debut as a late substitute against Dinamo Zagreb in the Europa League in December 2021. Later signing a new deal with the Hammers and appearing once more in a European Conference League fixture, Keenan spent most of the 2023/24 season on loan with National League Dagenham and Redbridge for whom he made 27 league appearances scoring once. 

Aged twenty-two he was released by West Ham in the summer of 2024 and, having also appeared for City against Weston-super-mare later in the week, remained in search of a club.