[3][4] Originally trained by former world champion Ricky Hatton, Walker made his professional boxing debut on 22 September 2018, recording a fourth round stoppage win over Jan Prokes.
[6][7] On 19 August 2023, Walker won the WBA International welterweight title by defeating the previously unbeaten Cyrus Pattinson at Utilita Arena in Birmingham, knocking him to the canvas three times during the contest, before his opponent retired at the end of the eighth round.
[8][9] He successfully defended his belt by stopping Lloyd Germain in round three at Ulster Hall in Belfast on 27 January 2024,[10][11] but lost the title via unanimous decision to Lewis Crocker at Resorts World Arena in Birmingham on 22 June 2024.
[12][13] Returning to the same venue, Walker got back to winning ways with a unanimous decision victory over former British champion Lewis Ritson on 30 November 2024.
[14][15] In his next fight, he won the British and Commonwealth welterweight titles with an 11th round stoppage of defending champion Harry Scarff at Nottingham Arena on 25 January 2025.