Complex sentence: The 6' 1 Hearns stopped Curry in three rounds, however, the fight is best remembered in boxing circles as a rare, true example of "going down swinging," with Curry punching valiantly even as he fell to the canvas.
Split into simpler sentences: The 6' 1 Hearns stopped Curry in three rounds. The Hearns fight is well known in boxing circles as a true example of "going down swinging," with Curry punching valiantly even as he fell to the canvas.