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WASHINGTON, D.C.– Three-division champion Adrien Broner admitted to having a "big head" and a tendency to "overlook things" in advance of December's loss to Marco Maidana, who dropped him once each in the second and eighth rounds on the way to a unanimous decision that dethroned him as WBA welterweight titleholder on Showtime.

As a result, Broner (27-1, 22 knockouts) has spent the past month or so training at a gym in Washington, D.C., alongside IBF junior welterweight titleholder Lamont Peterson in advance of his May 3 bout with his 140-pound debut against Carlos Molina on the undercard of Maidana's clash with RING and WBC champion Floyd Mayweather at the MGM Grand on Showtime Pay Per View.

"This is where I made my big turn as a professional," said Broner, 24, speaking to a cluster of reporters at The D.C. Armory, where he was in attendance for this past Saturday night's unanimous decision by Bernard Hopkins over Beibut Shumenov on Showtime.

"We came back just to get back to being comfortable. I mean, doing the things that I was doing at a fast rate and a fast pace, sometimes, you get the big head and you overlook things and you stop doing the things that you used to do. So, now, we're back."

In the 28-year-old Molina (17-1-1, 7 KOs), Broner faces a man who was last in the ring for a 10th-round stoppage loss to ex-beltholder Amir Khan in December 2012.

"You have to see Adrien Broner train to judge how I train. I train for every fight like it's my last fight…Molina's going to come to fight, and to be the second person to beat Adrien Broner," said Broner.

"That's [beating him] always going to go into history, because I'm going to be going into history when I'm done with boxing. He's going to be there all night, and it's going to be a helluva fight."

Before losing to Maidana, Broner had earned title belts over three weight classes, taking the WBO's junior lightweight belt by third-round knockout over Vicente Martin Rodriguez in November 2011, and the WBC's lightweight title following an eighth-round stoppage of Antonio DeMarco in November 2012.

In his previous bout in June 2013, Broner jumped two weight divisions for his 147-pound debut with a split-decision victory that dethroned Paulie Malignaggi for the division's WBA's belt.

"I don't know if it's been done before, but I'm going to have to tell you," said Broner. "I'm going to be a four-time world champion in four different weight classes at the age of 24. I'm trying to do that."

Eventually, however, Broner wants a rematch with Maidana.

"Honestly, if I was able to fight Maidana on Sunday, I would have fought him on Sunday. After the fight, I was shadowboxing and ready to go again. But I was just, you know how it is, I'm a fighter. Boxing is boxing and business is business," said Broner, who traded his quest for an immediate rematch with Maidana for Mayweather's desire to fight the Argentine.

"I opened another fight for my big brother, and I'm happy for him, and I'm happy for Maidana. I gave them a chance to make that fight happen. But I'm going to get him. He's got to fight me…At the end of the day he's still gotta fight Adrien Broner. If somebody don't take too much punishment, we can fight in July. I'm going right back to camp. No partying and no breaks for me. I'm going right back to camp."