Born on 15 March 2003, in Exeter, Humphreys played in the youth setup of Reading before a stint in grassroots football.

[5][6] Humphreys was named on the bench for the first time ahead of a Premier League fixture against Bournemouth in December 2022, but did not feature.

His Chelsea debut came in the FA Cup third round on 8 January 2023, after being named in the starting eleven against Manchester City.

[10] He made his Championship league debut on 14 September 2024 in an away 1–0 win at Elland Road in which he was also sent off in the 98th minute for a second bookable offence.

[17][18] Humphreys is a practicing Muslim, and has spoken out about the role of faith in his daily life and footballing career.