Hagler would do Jones because he actually understood skill and was never intimidated

Hagler would pressure Jones, stick to him, and corner him. Add to that Hagler's physical strength, chin, stamina, wealth of experience against all kinds of monsters, and his superior skill and it spells "bad night for Roy". The skill factor should not be overlooked. Hagler confused Duran with his switching so smoothly in and out of the southpaw position - and Duran was light years ahead of Roy in terms of both experience and skill. I did a post on another board acknowledging that Duran is a defensive master and yet Hagler was connecting very often because he was both highly skilled and confusing.

Eddie Futch gave Montell Griffin an effective strategy for Jones because Futch saw what everyone else was too dazzled to see - technical weaknesses. Griffin pressured him, stuck to his chest, and tried to pin him with hooks on the inside. Watch any of Roy's fights and when he is cornered and the opponent (usually just that - an opponent) is close and on him, he looked utterly bewildered.. stretching his neck, turning his head, even closing his eyes. This is where Hagler would be. And Hagler is far stronger than Griffin and Hopkins.

I see Jones leaping in to potshot Hagler and Hagler timing him with an overhand and then sliding right in and working his ribs, bulling him into the corner, and preventing escape. All night.