MIAMI BEACH, Florida –  The most Floyd Mayweather remembers an opponent out-weighing him by on fight night was approximately 20 pounds.

The undefeated legend still won that bout very easily in June 2005, when he dominated the late Arturo Gatti for six rounds until their junior welterweight title fight mercifully was stopped. Mayweather estimated Thursday that Gatti weighed 160 pounds when they stepped into the ring at Boardwalk Hall in Atlantic City, whereas Mayweather weighed 140.

The 44-year-old Mayweather figures to face more than double that weight disadvantage Sunday night. Logan Paul can’t weigh in at more than 190 pounds Saturday, but there isn’t a contractual limit to what Mayweather’s opponent can weigh when he enters the ring for their eight-round exhibition at Hard Rock Stadium in Miami Gardens.

Mayweather has not weighed in at more than 151 pounds for any of his 50 official fights. The Grand Rapids, Michigan, native wouldn’t say during a press event at the venue once known as the Versace Mansion how much he’ll weigh Saturday or Sunday.

Whatever Mayweather weighs, the heavily favored five-division champion isn’t the least bit concerned about boxing a completely inexperienced opponent who stands seven inches taller than him and could enter the ring 50 pounds heavier than him.

“A lot of times I fight these guys, I’m always at a weight disadvantage,” Mayweather told BoxingScene.com. “But like I always tell people, you know, guys be like, ‘Well, I’m bigger. I got a longer reach.’ I’m a better fighter. I’ve got a strategy. I know how to strategize. I can fight. It’s what it is.”

Their skill levels are so absurdly far apart, Mayweather maintains that this will amount to some of his easiest work in their Showtime Pay-Per-View main event (8 p.m. ET; $49.99). While Mayweather is generally regarded as the best boxer of his generation, Paul, a 26-year-old YouTube star, lost his only pro bout, a six-rounder, by split decision to social media rival Olajide Olatunji, better known as “KSI.”

“It doesn’t matter,” Mayweather said. “Weight doesn’t win fights. You got one heavyweight that weigh 200 and another heavyweight that weigh 260, and the guy that weigh 200 wins, we don’t say, ‘Oh, it’s a weight disadvantage.’ I don’t worry about that. I don’t cry. I don’t complain. I just go out there and do what I do.”

Keith Idec is a senior writer/columnist for BoxingScene.com. He can be reached on Twitter @Idecboxing.