I agree that it is likely that Pac, JMM and Mayweather probably at one point used PEDs. Particularly Mayweather when he fought Canelo, it is very hard to believe that he wasn't on something that night. When you look at his physique and conditioning compared to his physique before or after he fought Canelo, he was much more shredded and primed for Canelo. Maybe he was using something legal, or wasn't tested as often, but it seemed to me that Mayweather knew he needed something a little extra to beat Canelo. In addition to weakening Canelo via the catchweight, he knew he still needed something extra or he was gonna lose. He clearly put in a much more rigorous training camp, he was supremely confident that he would win, he must have been taking some kind of fat burner, maybe it was legal, who knows, but whatever he was on, he clearly got himself into the kind of supreme condition that he would never be in ever again in his career. If you look at his body vs Canelo then compare it to when he fought Maidana the next year, he was clearly not the same fighter that he was vs Canelo. Vs Maidana, he was slower, less elusive, more dull, etc. Vs Canelo he was arguably in the best shape of his entire career. Vs Maidana he knew he was easier to beat than Canelo so he didn't need to train as hard, he knew he didn't need anything extra to beat Maidana. he even said so himself, that vs Maidana all he needed to win was to bring his "B" game, while vs Canelo he obviously needed his A++ game. That's just my suspicion that Mayweather was on something when he fought Canelo, just looking at his physique and condition that night. But, again, it's possible that he may have just been training harder for Canelo, and using some kind of legal fat burner. That's certainly a possibilty, but all I'm saying is from a physique standpoint, I don't think anyone can deny that Mayweather certainly looked and acted like he was on something. If you watch his training videos in the build-up to Canelo, he seemed to have unlimited energy, he would say stuff like how young he felt, and all this stuff. This was the last time we ever seen Mayweather train this hard or get in that kind of shape. A couple months later when he was training for Maidana it was like he all of a sudden became an old man. Maybe that was due to how grueling the Canelo fight was for him or maybe he fell out of shape after the Canelo fight. I know there's that video of Mayweather driving to McDonald's drive-thru in the early morning hours after the Canelo fight. He didn't have that confidence that he was going to win, like he had vs Canelo, and he ended up putting in a very lackluster performance that many people thought he lost vs Maidana compared to when he put on the performance of his life vs Canelo. Many suspected Pacquiao and JMM to be on PEDs. Mayweather made the accusations against Pacquiao and JMM, and required stringent drug tested when he fought both. And it always struck me as really odd when JMM was weirdly drinking his own urine in 24/7 when he was being drug tested before fighting Mayweather. I think everyone would agree that it frankly bizarre as hell for JMM to drink his own urine and talk about it, and to me it almost made me think that this was JMM's way of like trying to act like his urine was so clean he could drink it. I just never understand how anyone would drink their own urine as JMM did, and this had to be a result of Mayweather demanding all the drug testing. Unless we're to believe that Marquez had been drinking his own urine his entire career. It seemed almost like Marquez had never seen urine before and decided it might be a good idea to start drinking it, which made you wonder if he had been drug tested in the past. I would disagree with your statement that the US drug policies in the US these days is "lax". Ever since Mayweather accused Pacquiao of being on something and demanded random testing, VADA drug testing has become much more stringent and we are seeing more random tests than ever before and more positive tests than ever before. Compared to decades ago when drug testing was practically non-existent in the boxing in the US or anywhere in the world for that matter, in the last 5-10 years the US thanks to Mayweather's crusade to ensure that he had a so-called level playing field has led to sweeping changes in drug testing in this country. So calling drug testing "lax" in the US is just wrong. These days, Boxing in the US has more stringent drug testing than at any time in history and it's more stringent than any country in the world. That doesn't mean that it's impossible for someone to still game the system, but it's clearly much harder and more risky to do so than any time before. Like what Shane Mosley got away with in the 2000s with taking the clean and the clear and never testing positive, no one could get away with that kind of thing today. He just simply wasn't being tested back then, no one was like they are now. And given that drug testing is much less "lax" today than it was in the past, if anything we shouldn't just assume that everyone is on something today, it should be the opposite now. It's that today we should give more benefit of the doubt to fighters who get tested so often, vs fighters from the past who never were tested like they are now.