How does Marvin Hagler fare in the shark-tank...

Yea those "other" guys were good fighters, BUT not on the level of Hagler, he held the undisputed title from 80 to 87, none of those other fighters mentioned in the so called shark tank held the title that long with the exception of Hopkins.
Hagler's prime was 1983 A LONG WAY FROM 1987, when Ray was given his gift, and of course you expect a legend like Duran to give Hagler a tough fight, he beat Leonard, LOL..
And the other guy's mentioned were not even in Haglers division, Julian Jackson was 154, and Benn and Eubank spent the majority of their careers at 168, Hagler as best to my knowledge spent his entire career at 160..

 

Part of that may have had to do with the fact that he wasn't swimming in the sort of "shark tank" that we're talking about.

Weather or not it was a gift is subject to opinion. There are plenty ( including myself ) who deemed Leonard as the rightful winnder. And making concessions for Hagler being "past it" while not doing the same for Leonard is contradictory to say the least.

Yes Leonard and Duran fought in 1980 and in a much more reasonable setting at welterweight for those two men. Duran was well over anything that even came close to his best weight when he fought Hagler and was past it by 1983, yet he came very close to edging Marvin. Leonard also fought Duran three times. Hagler never fought him again.

Well fighting men who were beneath his natural weight class was something that Hagler was well accustomed to, but I agree that facing men above just simply isn't practical as he never took that chance

 

Jackson, G-Man, Toney, Benn, Eubank, Nunn, RJJ, Hopkins, McCallum, Kalambay

Marv was versatile. He might have a few testy moments against Jackson and GMan but I think he'd stop them both middle to late. He'd outhustle Toney, 10-5ish. He'd box the living **** out of Benn, bust him up and stop him. Decision Eubank on activity alone. Nunn didn't hit hard enough to have Marv's respect (nobody sparks Marv like Nunn sparked Kalambay)..............In a one off fight, I might favor RJJ. He had the tools to get in Marv's head like a few others did. Tough call..........All things being equal, and I don't know that they are, I'd favor Marv's ticker over Hopkins. I've seen Hopkins look for a way out of tough fights a few too many times and this would be the toughest he ever saw........I'm not in love with McCallum at Middleweight. This is a fight that maybe could have happened in the 85-87 timeframe. McCallum didn't have enough juice at the time to create a demand for the fight. For me, McCallum was very good at a lot of things and not great at any one thing aside from body punching. And I can't envision him wearing Marv down with a body attack. I don't think it's a great matchup for McCallum. He wasn't going to knock Marv out and it could be easily argued that Marv was the better mover of the two....................I could see Kalambay troubling the hell out of Marv, but if we're talking a prime Marv, there would be a lot of punishment meted out in clinches, and I think he'd get Kalambay late.
So I'll say Marv goes 9-1. I'm not saying Jones was a greater Middleweight, but I think he has the tools to upset Marv.