RJJ V Mike Tyson

[Eloking]

who would've won at the time?

It depend when RJJ would have fought Tyson. If it was before he goes to jail, then Tyson would have easily won (in my opinion). But since Tarver VS RJJ was in 2003-2004, I'm pretty sure Tyson would have lost. At that time he was nothing compared to his prime.