[6] At the age of 16, Eubank Jr. and his brother Sebastian[7] (1991–2021) moved to the United States to live with a guardian named Irene Hutton.

It was explained by their mother Karron, as a paper adoption,[8] as a means of gaining the two brothers dual citizenship without the need to marry, and to enhance their prospects of sporting careers.

Eubank Jr. won the fight after a right uppercut knocked out Siala in the second round[20][21][22] On 15 September 2014, Frank Warren announced that Eubank Jr. would challenge unbeaten Billy Joe Saunders for the British, Commonwealth and European titles on the undercard of Derek Chisora vs. Tyson Fury II on 9 November at the ExCeL arena.

The bout went the distance, with the experienced Saunders controlling the first six rounds with his footwork, style and technical boxing ability, as Eubank Jr. was mostly inactive.

From round seven onward Eubank Jr. was in control with a much higher punch output, this resulted in the two young boxers brawling and trading hard shots for the rest of the fight.

[27][28] On 30 December 2014, Frank Warren announced that Eubank Jr. would fight undefeated WBA interim middleweight champion Dmitry Chudinov (14–0–2, 9 KOs), on 28 February 2015 at The O2 Arena in London on the undercard of Tyson Fury vs. Christian Hammer.

[36] Eubank Jr.'s first fight after signing with Matchroom was a bout against Tony Jeter on 24 October 2017 where he defended his WBA interim middleweight champion.

[39] On 12 December 2015 Eubank Jr. fought Gary O'Sullivan in an eliminator to challenge the de jure WBA middleweight champion, Daniel Jacobs at the O2 Arena in London on the undercard of Anthony Joshua vs Dillian Whyte.

The bout was originally scheduled to take place in May 2015[40][41] [42] The fight was well anticipated, as the pair had a history of feuds in the past, with O'Sullivan targeting Eubank on social media.

[43][44] In February 2016, Hennessy Sports announced a fight between Eubank Jr. and Nick Blackwell (19–3–1, 8 KOs) for the British middleweight title would take place on 26 March at the Wembley Arena in London.

[48][49] Blackwell was taken to hospital with bleeding on the brain, and was placed in a medically induced coma for treatment, from which he was bought out one week later and retired from competitive boxing.

[58] Throughout 2016, Eubank Jr. made it clear that he wanted to challenge the undefeated unified middleweight champion Gennady Golvokin.

[65][66] On 13 December 2016, Eubank Jr. announced via his Facebook page that he would be making his debut in the super middleweight division, fighting Renold Quinlan (11–1, 7 KOs) for his IBO super-middleweight title.

Quinlan won the then-vacant IBO title defeating former world champion Daniel Geale in October 2016 via knockout in round two.

[72][73] Eubank Jr. stopped Quinlan in round ten in a fairly one-sided fight to win the IBO super-middleweight title.

The fight was stopped by referee Howard John Foster, 2 minutes and 7 seconds of round ten after seeing Quinlan backed up against the ropes after being hit with continuous headshots.

[75][76] Reports suggested on 1 June 2017 that Eubank would make his ring return in July 2017 defending his IBO super middleweight title against former multiple-weight world champion Arthur Abraham (46–5, 30 KOs) in London.

Eubank Jr. landed heavy uppercuts throughout the fight, many single and some in combinations, with Abraham only managing to connect a few shots clean.

[83][84] On 7 July 2017, Comosa AG, a joint venture between Sauerland Promotions and Richard Schaefer, announced the winner of Abraham and Eubank would be taking part in a super-middleweight knockout tournament called the 'World Boxing Super Series'.

[89] Eubank Jr. used his hand speed and power shots to stop Yıldırım in round three of their fight to confirm his place in the semi-finals of the tournament.

The fight came to an end after a flurry of shots, which were unanswered and the final punch was a left hook to the head which again dropped Yıldırım.

Groves, the bigger man in the ring, used his jab to control the fight after a cagey round and mostly fought on the back foot, occasionally landing the big shot.

The rivalry between DeGale (25–2–1, 15 KOs) and Eubank began a few years earlier, after a series of run-ins, from sparring with one another in the gym to trading verbal insults across social media.

Post-fight, Eubank Jr. reflected on the bout which had gone the full ten-round distance: "I had him [Morrison] hurt bad in the second round and probably could have ended the fight.

Williams' home advantage ultimately did not pay off, as Eubank Jr. produced a dominant display to emerge as the winner via wide unanimous decision, with judges' scorecards of 116–109, 116–108 and 117–109.

[124] Speaking in his post-fight interview, Eubank Jr. stated his 'happiness' with his victory 'in spite of Williams' dirty tactics' and 'pre-fight trash talk': "I am happy with the performance, I wanted to teach that man a lesson, he said some quite menacing things to me in the lead-up to this fight.

Eubank Jr. later admitted in an interview that he was struggling to reach the required 157lbs weight limit, which proved to be cause for worry with his father, who threatened to pull him out of the fight.

[125][126][127] On 5 October 2022, a statement was released from the British Boxing Board of Control declaring the fight was prohibited from taking place on after Benn tested positive for clomifene.

[133] In July 2024 it was announced Eubank Jr. had signed a promotional deal with Boxxer having become a free agent following the end of his association with Wasserman.

[134][135][136] In January 2025, Turki Alalshikh announced on X that Eubank and Benn have accepted the fight which would take place at the Tottenham Hotspur Stadium scheduled for April 26.