Did Hearn's try to KO Hagler?

Marvin initiated the brawl. That was smart b/c Hearns had the reach advantage and weak chin. So pressure him...don't let him outbox you from the outside. Make it an inside fight.

As for Hearns, he reacted not so much by trying to KO Hagler but by catching him with a big right as he came in. The result: probably the most we've ever seen Hagler in trouble. With that wobble, of course Hearns would throw some more bombs to see if he could finish him. But even then, he was doing this either against the ropes or as he backpedaled.

As Hagler kept bulling forward, Hearns indeed started to move and box, throwing big long rights while in a backward slash posture: /.

Then he's pinned against the ropes but that isn't exactly where someone who is looking for a KO wants to be, Ali v Foreman notwithstanding. The rest of the fight he backpedaled even more so I don't see trying to KO Hagler as the culprit.

Hagler's fury was the culprit.