Anthony Joshua's 6-foot-8 heavyweight contender, Emmanuel Odias, remains unbeaten.
The former German amateur star, who is represented by AJ's 258 Management, improved to 4-0 on Saturday night with a fourth-round knockout victory over Kevin Massirika on the undercard of the Felix Cash vs. Tyler Denney bout.
Macirika (2-2) was the British bare-knuckle boxing champion with the now-defunct Bare Fist Boxing Association (BFBA) before turning to professional boxing in 2023.
Big Kev dislocated his shoulder in his last game against Lewis Wright at Blackpool in March and made a brave appearance against the O'Dias on short notice.
His bravado was on full display from the start, as he lunged out of a southpaw stance to land a looping left hand before settling on his backfoot.
The tall O'Death started throwing jabs from the early stages, but was unable to land any notable blows with his backhand.
But that all changed early in the second round when a powerful right smashed Masirka to his knee.
O'Dias landed a nasty left hook moments later that appeared to stun his Manchester opponent for a moment.
Sensing the fight was running away, Macirika came out to gain the advantage in the third round.
The former boxer did a good job of thwarting O'Diaz's attacks but was unable to land the succession of punches necessary to win the round.
In the fourth and deciding round, Odiase was light on his feet, easily dodging Massirika's punches and landing a powerful left hook that sent his opponent to the canvas for the count-out.
“I'm happy with the performance because I've heard people say, 'Does he have enough power for the heavyweight division?'” Odiase said immediately after his win.
“Well, tonight I have shown you that I have the power…
“It's a great way to win. Health is the most important thing, so I hope he stays healthy. But I definitely hit him with some good shots and in the previous round he was shaking his head like, 'no big deal.'
“So I said to myself, 'Son, I'm going to show you,' and I did. It was a great knockout.”
“But of course, like I said, we pray that he will make an okay recovery.”
Matchroom Boxing promoter Eddie Hearn said: “He's a talented fighter but he's at a bit of a disadvantage with no British amateur background and no name recognition in the UK.
“But AJ and his team have seen him through sparring and know how good he is.
“And we see how good he is, very good punch selection and it was a brutal knockout.”
“They came out aggressively, they didn't stop attacking, and as soon as the shots hit them, they were out.”
