His best performance? Chico. That's the best Floyd has EVER looked. His best win? Hatton. Brought up in weight, yes, but the No.1 LWW at the time.
Probably something like: Castillo Corrales Alvarez Cotto JMM Genaro Hatton Mosley Oscar ...highly debatable between most of those names, really. While lacking a clear "best win," he has 9 or so which are A-caliber victories.
People selecting Marquez are probably doing so on his name alone (and this is quite probably why Floyd chose him as a comeback opponent, despite the gross mismatch it would be, at the time). A Super Featherweight rushed up to 142, in the space of two Lightweight contests, for a 144 catchweight bout, is evidence enough. The fact Mayweather couldn't be bothered to make the contracted limit... ...Well - this is potentially one of his worst wins.
The other side of the argument is that Marquez would go on 2-3 years later to score the greatest victory of his career (as well as a legacy boosting MD loss), and perhaps one of the best wins of the whole last decade, at that same 142 pounds he weighed in against Floyd at. Oh, and that Floyd dropped him and beat him by a 13 point margin in a 12 round fight. Marquez has never lost a fight anywhere remotely close to that wide ever. When you factor in both arguments, I think it's clear to say that it is far from one of his worst victories. You sound like a biased bitter fanboy when you say something like that.
I'm sorry - I think you must have mistaken me for one of the mentally challenged posters, whom you're probably quite used to bickering with on a regular basis - "fanboy" of who, exactly? "The other side of the argument", as you put it, is flawed, in that it took over three years, after the Mayweather bout, for Marquez to score a significant victory in the Welterweight division - in 2012. After Mayweather, he went back to competing in the 135 division and subsequently the 140 division, over the course of two years, before even weighing in at over 140 again. According to you, this somehow balances out the fiasco that was the Mayweather/Marquez catchweight bout, in 2009. Not really; not even remotely. It neither erases the fact that Marquez was rushed into the weight to fight Mayweather nor the fact Mayweather failed to meet the contracted weight.
So have you not read the multiple sources including Marquez that said he signed a contract in the week before the fight to extend the weight limit from 144 to 147? Are you denying that? Or just ignoring it? Marquez fought two fights ever at 140. That suspected fixed KO1 tune up before Pac III was at 140. Pac III was a WW fight in fall of 2011, just two years after Marquez lost to Floyd, that Marquez lost, but lets not play dumb to how that third fight with Pac played out... Then he fought Fedchenko for the bogus WBO 140 belt, only to fight Pac IV at WW to score the biggest win of his career. I don't know how you can dismiss any of that, any of what my original post said, and dismiss the whole fight itself. That's just silly and hopefully you know it.
Nice spin on the contracted weight. The fact is an agreement was made, just before the weigh-in, because Floyd knew he wasn't going to make the agreed 144 limit. A rushed penalty clause was written into the contract, which Marquez agreed to. The way you describe this event, makes it seem as though Marquez just casually agreed to an increase in the contracted weight limit, for no particular reason. No mention of a last-minute, contractually agreed financial penalty to go with it - costing Mayweather $600K. If you want to dress that up as Marquez agreeing to extend the limit to 147 then be my guest. It doesn't change the fact that Floyd failed to reach the agreed 144 catchweight. So I am neither denying nor ignoring anything; just not embellishing anything, either. The second paragraph of your post repeats what I have already stated, more or less, with some added spin and subjective opinion of your own. Again - The fact is, Marquez didn't win a significant bout at over 140lbs until late 2012 - more than three years after his fight with Mayweather. And, it really doesn't matter if you want to dispute the result of Marquez/Pacquiao III or not. That bout took place after two years of Marquez competing at 135 and 140, defending his Ring Lightweight Championship (which he had held since 2008, through 2009 and went into 2010 with) in the process. So I haven't dismissed anything you've mentioned in your last post or the one before that. I just think you have framed what is already a weak argument in such way so as to sustain your obvious belief that Mayweather's win over Marquez is up there with one of his best. Given the reality of the circumstances, it clearly is not, and your reasoning does not overturn those circumstances.