I may have used the wrong terminology. The point I was making, is that you've got fighters today who are weighing in at their chosen weight class, and who are then rehydrating by huge amounts before they enter the ring on fight night. You've got Canelo Alvarez who can weigh in as JMW, who's then a LHW by fight night. You've got Chavez Jnr who's previously drained himself to weigh in at MW, who's then rehydrated by over 20 pounds after the weigh in, to fight as a CW. So I don't know if it's due to dehydration/diuretics, but it's not natural. Bob Foster's walking around weight was only about 179 pounds, even if he had more than a month away from the gym. Many of today's fighters aren't fighting in their natural weight class.
Have you been to a weigh in? They dehydrate themselves to an absurd degree because they only have to be at weight for that moment on the scale. How else do you think there are so many tall featherweight? These guys come down 35 pounds. Fighting 4 times a year it is doable; if you fight more you stay closer to weight.
But the top featherweights from 2010 aren't any taller than the top featherweights from 1980 (before same day weigh-ins). I know that guys cut weight-- I could be wrong but I just don't see the evidence suggesting that the move to day-before weigh-ins has really dramatically changed where fighters of a given size fight.
Most of today's fighters would all be fighting in higher weight classes if they fought in earlier eras. In the days of same day weigh ins, most fighters only put a handful of pounds on after the weigh in. Whereas today, it can be anything from about 6-20 pounds.
Yes if Jones had to make 160 for a same day weigh in he wouldn't be nowhere near as effective as if he had to make 175 for a same day weigh in.
That's precisely what I'm questioning... How do we know that most of these guys wouldn't fight in the same weight classes, just with less time to eat and rehydrate between their weigh-ins and fights?
What are you smoking dude? Have you ever watched Hagler in his prime? No middleweight in the history would have an easy time beating Hagler. Jones would have a chance but my money would be on Hagler.
Any fighter of today who rehydrates by such large amounts after the weigh in, aren't fighting in their natural weight class. If someone like Canelo or Chavez Jnr can put on 15-20 pounds after the weigh in, then they have to be shrinking themselves down to make weight. They have to be dehydrating themselves/using diuretics. If we went back to same day weigh ins, they wouldn't be able to fight at JMW and MW. Because rehydrating by the amounts that they do isn't natural. Which would mean that if they weighed in as they do now, they wouldn't be in any condition to fight later on in that same day.
Those guys are extreme cases who struggle to make weight though. Very few guys are putting on 20 lbs post-weigh in. Btw, can fighters do the night of the fight weigh-ins in their clothes?
You're right, those two are extreme cases. But a lot of fighters rehydrate between 6-12 pounds. Regarding the fight night weights, I'm not sure.
I'm a die hard Hagler fan but RJJ would be too quick for him and would win with Hagler chasing him the whole fight. RJJ wouldn't be able to do any harm to Hagler though.