As one who grew up in Brockton, MA and followed Marvin (and even stood next to him a few times) It would be hard to not consider him as one of, if not the greatest middleweight of all times.

No one had a better chin than Marvin. You can talk punching power all you want but when you are Tommy Hearns and you're fighting Marvin and land your best punch and Mr Hagler doesn't even flinch you have problems. Also Marvin knocked out more opponents with short punches than any fighter I've witnessed. He did not need the big Michael Spinx punch that started from 3 feet behind his head to do damage. Marvin could take you out with something resembling a jab.

Marvin's worst fights were against Duran and Leonard. Don't know what as up with Duran as Marvin should have quickly wiped the floor with him but I guess in the end Roberto's rings savy and defensive abilities gave Hagler problems. Leonard I have less respect for. He ducked Marvin and waited for age and loss of speed to kick in. Even then Sugar Ray's victory, if you can call it that was not impressive at all. He ran and ran. Winners don't run. I do believe that Marvin made a tactical error when fighting Leonard. Simply put he tried to be cute like Sugar Ray and prove he could fight that style. Marvin needed to cut that ring off and get down and dirty inside where he was most effective and in the end Hagler failed to do that. When you fight the media darling (Leonard) you need to take their head off for a win.