Representing England, Fitzgerald won a gold medal in the welterweight division at the 2014 Commonwealth Games in Glasgow, Scotland, knocking opponent Mandeep Jangra from India to the canvas three times during the final which he took by unanimous decision.

[5] Fitzgerald turned professional in September 2015 signing a promotional deal with Eddie Hearn's Matchroom Boxing[6][7] and made his pro-debut on 27 February 2016, stopping Ben Heap in the third of a scheduled four rounds at Manchester Arena.

[8] He claimed his first professional title on 30 March 2019, winning the vacant WBA International super-welterweight belt thanks to a split decision success over Anthony Fowler in Liverpool.

[14] Fitzgerald vacated his British title due to his personal issues and having served time in prison on remand following his arrest for an alleged assault and subsequently admitting a charge of breach of the peace at Preston Magistrates' Court in November 2020.

[23][24] In February 2024, Fitzgerald told the media he wanted to relaunch his boxing career after he was found not guilty of rape following a trial at Preston Crown Court stemming from an allegation for which he was first arrested in April 2020.