If Michael Moorer could.... Andy Ruiz is not that much bigger than Beterbiev once you take away the blubber.... Usyk had trouble containing Beterbiev as an amateur.... Michael Hunter lost to Beterbiev as an amateur..... Don't underestimate Beterbiev's wresting pedigree and his ability to manipulate space and to maneovour people into vulnerable postions where he can land powerful punches on them. PS I am not saying he would be successful at HW but just dont discount him getting some good wins. His power would still hurt people and his technique is still more polished than most HWs out there..... By the way....fully hydrated, Beterbiev is not that much smaller than Joe Louis.
At HW, no he would bulk up then be very slow without his LHW power, which would not come with him. At CW he would have a more realistic shot as he is going up 15 lbs. Some of his power would be retained.
Imagine: Lerena, Okolie ( in eddie backyard ), ol Briedis ( I suspect he is not acual this moment anymore lol ), Makabu, then this Cieslak etc lads, Dorticos.
We already do know how fights tested in US A.J from his fight vs late replacement Ruiz Jr called before 1 st fight by some ppl as fat obese hopeless Panda. U really are sure that he might beat Makabu, Dorticos, Lerena, Briedis, Okolie? I think that no. Even current Usyk's version is too old now to beat these all in row. Also vs A.J he will have lesser chances than even Gassiev and not likely will KO A.J in 2 fights in row. A.J is canelo like for U.K boxing business.