Maybe Ultimate Fighting Championship (UFC) lightweight champion Conor McGregor got too accustomed to fighting at welterweight, because the “Notorious” mixed martial arts (MMA) fighter is having trouble managing his weight.

That’s according to undefeated boxing icon Floyd Mayweather Jr., who will face the power-punching Irishman this Saturday night (Aug. 26, 2017) on pay-per-view (PPV) from inside T-Mobile Arena in Las Vegas, Nevada.

Apparently a “strong source” told Mayweather that McGregor is struggling to make the 154-pound limit, which could dramatically alter the outcome of their pugilistic affair this weekend in “Sin City.”

“He better be trying to get his weight down, my weight is down,” Mayweather told MMA Fighting. “I know he’s over right now, what he weighs. What I was told, I do my homework, I’ve been hearing a lot about him getting IV bags. I don’t know if it’s true … rumors. He got seven IV bags. You know with the Nevada commission, that’s illegal.”

Something McGregor should be used to after this.

It would be surprising to learn that McGregor was, in fact, struggling to make his mark ahead of the biggest and most lucrative fight of his career, considering how successful he was competing at the featherweight limit of 145 pounds.

We’ll find out in a little over 24 hours.