When Maphosa was 9, his father, a maths teacher and part-time accountant, emigrated to England in an attempt to find work and provide a better life for his wife and three sons.
His interest in boxing came after watching Bernard Hopkins fight on TV, saying, "I enjoyed playing cricket and running around in the playground at school, but then I saw a clip of Bernard Hopkins on TV and I liked what he was doing so I decided to get myself to a Boxercise class for general fitness to begin with but and that led onto me going to Middlesbrough ABC and from there I have never looked back.
[5] He also competed for the British Lionhearts at the 2015 World Series of Boxing, losing a split decision to Cuban Domadores' Joahnys Argilagos at the York Hall in London.
[6] Signed with Frank Warren's Queensberry Promotions,[7] Maphosa made his professional debut on 13 May 2017, scoring a four-round points decision (PTS) victory over Gary Reeve at the First Direct Arena in Leeds, England.
[8] Following four consecutive wins, he scored his first stoppage victory on 28 April 2018 at the Temple Park Leisure Centre in South Shields, stopping Steven Maguire via technical knockout (TKO) in the fourth and final round.