Valdez had numbing power, quick hands, good stamina and excellent upper body movement with a solid guard to back it up. This on top of being a skilled and smooth operator. He had a granite and a strong midsection as proved by the Briscoe bouts. He was however a slow starter with plodding feet and susceptible to cuts and swelling. Duran like in the Hagler fight would receive praise for taking it to the full 15. Hearns could take advantage of his early lethargy and even cut him to force a stoppage. If the cut isn't so bad then Hearns can also try to bank the early rounds and get the decision, but I don't know if he'll last all the way. Leonard would have to move his way into a UD. As long as he doesn't go to the well too many times he should be in the clear. Hagler has the ability to box smartly, move and use his right jab to bust up Valdez. He will also come out of exchanges better than the rest. Hagler by competitive UD in a fan thrilling fight.
Valdez UD Duran Valdez KOs Hearns in the 12th while being down on the cards Hagler clear but close UD. Valdez SD or stops SRL in 15th Rodrigo goes 3 and 1
Valdez was a solid fighter, I don't rank him as a great though. Of the 4 Kings, I give him a chance winning a decision against Duran because that was the fat era Roberto who was unpredicatable in the 80s. Hearns might be winnable given Tommy's chin/stamina issue. Not a winner against Hagler nor Leonard.