geez, i dont think mancini could cover enough ground to smother ken's jab and keep him cornered to land enough punches. i think buchanon would take mancinis power as he did with duran and just run away with a decision. buchanon was great fighter and imo would have given whitaker and mayweather hard hard fights.
Ray Mancini would press forward all night and try his best, but the Scot would be way too much for him. After finding it all too easy to just outbox Mancini, Buchanan would load up a bit and punish Boom Boom by busting his face up. Buchanan was way too much for a guy like the likeable Ray Mancini. Buchanan by a lopsided 15 round decision with great boxing on display.
Obviously I pick Buchanan to win, but Mancini would make it interesting, although not too competitive. As has already been noted, Buchanan's lateral movement would be the key in this fight: he moved quickly, intelligently and perpetually, and could do so for 15 rounds. Buchanan UD.
Buchanan was a very fine boxer ,and a tough man,Mancini was strong ,could hit a bit and liked to get inside,against Buchanan,he wouldnt be able to,Ken' s jab would be in his face all night,and the Scot had good foot work to take him out of danger if need be.Buchanan by udec ,or even a tko late.
I agree entirely with what has been said already, Ken would be far too much for boom boom. He would pressure him into submission with superior technique and guile. Late TKO