non-bad prospect losses

[Ruthless-RKO]

Even Price vs Thomson I maybe?

Not sure I’d go with Price vs Thompson. Price lost a hell of a lot confidence after that fight and was never the same again afterwards.

Yeah Prices losses to Thompson were probably the WORST prospect losses! He was never the same after those fights.

Yeh, didn’t he just get awarded ESPN prospect of the year 2012 or something? Just before the Thompson fight.

[Ruthless-RKO]

I know he's not yet done much but Hinata Maruta vs Hidenori Oake was generally considered a "good loss"

Lomachenko vs Salido mate? - if you count a 1-0 Lomachenko as a prospect

Three recent British ones
John Ryder vs Billy Joe Saunders
James DeGale vs George Groves
Whyte vs Joshua

Even Price vs Thomson I maybe?

Estrada vs Roman Gonzalez (I guess Estrada was a contender tbf)

Not sure I’d go with Price vs Thompson. Price lost a hell of a lot confidence after that fight and was never the same again afterwards.

Just had to.

[Monte Fisto]

Hughey Fury loss to Joseph Parker

[Lightsoot]

Tyson Fury to John McDermott

[bennie]

John Conteh lost his first career fight to Philadelphia's cagey Eddie Duncan on a disputed 10-round decision at Wembley in 1972 but it did him more good than harm. Conteh possessed a ruthless streak and was often rash with his attacks in those early days but he learned to pick his punches and quickly developed into a fearsome light-heavyweight. Conteh made his pro debut in October 1971 and was crowned world champion in October 1974 with a dazzling decision over Argentina's Jorge Ahumada. That's going some.

[chiggsy]

Macklin to facey

[bennie]

Does Bruno count?

Bruno didn't really improve as a fighter until he linked up with George Francis after the first Tyson fight in 1989. Francis was a fine trainer who ran with his fighters and jumped into Highgate pond with his fighters at the finish, whatever the weather. He boasted a strong connection with black fighters going way back. He trained the first immigrant to win a British title in Bunny Sterling and the first immigrant to win the British heavyweight title in Bunny Johnson. He also knew how to handle the 'nutters', such as John Mugabi, Frankie "The Animal" Lucas and in particular John Conteh, a nasty piece of work both in the gym and in the ring. Conteh made Evander Holyfield look like a choirboy when it came to sly use of the head. When Conteh butted Matthew Saad Muhammad in their first encounter in Atlantic City in 1979, Saad was so badly cut that his corner used an illegal stimulant to seal the wound over the left eye, prompting Francis to storm over and a confrontation occurred with Saad's cutsman, Adolph Ritacco. Ritacco was later banned for life for his use of the stimulant which would have blinded Saad if some had fallen into his eyes.
Bruno looked a more complete fighter under Francis than he ever did before and surprised everyone with his performance against Lennox Lewis in 1993 in Cardiff, although he still froze when Lewis caught him in the seventh round. Then came the gutsy McCall win two years later and big Frank finally showed that he had learned how to hang on and that was all down to Francis. Interestingly, when Bruno jumped ship from promoter Mickey Duff to promoter F rank Warren before the McCall fight, Francis remained as Bruno's trainer and that would have been at the insistence of Bruno because Francis had been heavily involved with Duff fighters in the past, particularly when Duff fighters were fighting in the States, such as Mugabi, Cornelius Boza-Edwards, Nick Wilshire and Duke McKenzie. Make no mistake about it, Warren would have wanted another trainer.