Joyce was born on 19 September 1985 in London to a Scottish-born Irish father and a Nigerian mother, and grew up in Putney before training out of Earlsfield Amateur Boxing Club in south-west London (Wikipedia). He did not take up boxing until age 22, after a series of Achilles injuries ended the track and field career he had pursued while earning a BSc in Fine Art at Middlesex University, graduating with upper second-class honours in 2009 (Wikipedia). He joined Earlsfield ABC and later said of the sport that shaped his adult life, “I don’t really like boxing, but I enjoy doing it.”

Joyce spent the whole of his twenties as an amateur rather than turning professional, compiling one of British boxing’s most decorated amateur resumes: a bronze medal at the 2013 European Championships, gold at the 2014 Commonwealth Games and the 2015 European Games, and bronze at the 2015 World Championships, all in the super-heavyweight division (Wikipedia). That amateur run culminated in a silver medal at the 2016 Rio Olympics, where he lost a contested split decision to France’s Tony Yoka in the final, a result many observers felt could have gone the other way. He turned professional in July 2017 at age 31, unusually late for a fighter of his caliber, debuting with an eighth-round stoppage of Ian Lewison in London (Wikipedia).

Joyce added Frank Warren’s Queensberry Promotions in a co-promotional arrangement with his original team, Ringstar Sports, in April 2019, shortly after stopping former WBC titleholder Bermane Stiverne in six rounds that February to claim the vacant WBA Gold heavyweight title (World Boxing News). The realignment gave him access to the UK’s biggest boxing platforms and set up his true breakthrough on 28 November 2020, when he stopped previously unbeaten fellow Briton Daniel Dubois in the tenth round at Church House, Westminster, in an all-British grudge match; Dubois, who suffered a fractured orbital bone, went to one knee and was counted out, and the win carried the British, Commonwealth, WBC Silver, WBO International and vacant European heavyweight titles with it (Wikipedia).

On 24 September 2022, Joyce knocked out previously unstoppable former WBO champion Joseph Parker in the eleventh round at Manchester’s AO Arena to win the vacant WBO interim heavyweight title, becoming the first man ever to stop Parker inside the distance (Wikipedia). It remains the signature win of his career and his best-documented payday, reportedly earning him a base purse of $2.2 million that rose to roughly $2.8 million with additional compensation (Sportszion). The Parker win positioned him as mandatory challenger for a unified heavyweight title shot, but he lost the WBO interim belt seven months later when he was stopped by Zhilei Zhang, ending his most direct route to a world title fight (Wikipedia).

Joyce’s reputation for granite durability was central to his public profile through the first six years of his career; he went twelve rounds unbeaten against Bryant Jennings, then absorbed heavy, sustained punishment in his first fight with Zhang while landing only 85 of 464 thrown shots and was never floored, despite being stopped on cuts and swelling around his eye (Wikipedia). That reputation made the two Zhang stoppages in 2023, and an outright knockout loss to unbeaten Russian Artem Suslenkov in Moscow in July 2026, especially newsworthy, with British outlets covering each as a marker of decline for a fighter long considered close to indestructible (BoxingNews24).

In April 2023, premium sportswear brand Castore signed Joyce as its first tier-one boxing ambassador, kitting him out for fights and training in exchange for an undisclosed fee, joining a roster that includes Sir Andy Murray and Jos Buttler (The Industry.fashion). His fight-night kit and ring walks have also carried branding from other short-term sponsors across his career, in the pattern common to UK heavyweight cards, though none of those additional arrangements were independently verifiable with a working source for this profile. None of Joyce’s endorsement deals’ financial terms have been made public.

No publicly documented company, media venture, or ownership stake beyond his boxing career and its associated promotional and ambassador agreements was found in the sourcing for this profile. Joyce’s commercial activity has centered on his Queensberry and Ringstar Sports promotional arrangement rather than outside business interests, a structure typical of British heavyweights of his generation who route their commercial income through promoters rather than personal ventures (World Boxing News).

Joyce has not publicly disclosed any real estate holdings, vehicles, or other major personal assets, and no outlet in the sourcing for this profile documents a specific address, purchase price, or property portfolio tied to him. His public biography ties him to Putney and the wider Wandsworth area of south-west London, where he trained at Earlsfield Amateur Boxing Club before turning professional, rather than to any documented pattern of luxury purchases (Wikipedia).