(Main pic of Floyd Mayweather with Justin Bieber courtesy of Showtime)
So what does the former two-time champion think of Floyd?
"I think Floyd beats everyone in history, and anyone who doesn't realize that by now is stubborn, blind, stupid, or all three," he told ESPN's NYFightblog.
"He is the best ever (pound for pound)."
Perhaps Paulie, a top-flight welterweight, is angling to win the Floyd Mayweather Sweepstakes? But in Mayweather's defense - and Paulie's - Malignaggi is known for being a brutally-blunt, no-nonsense guy so maybe he really means it.
Frequently cited as the greatest boxer of all time, Sugar Ray Robinson's (left) performances in the welterweight and middleweight divisions prompted sportswriters to create "pound for pound" rankings, where they compared fighters regardless of weight.
Is Floyd Mayweather greater than Sugar Ray Robinson, Willie Pep, Muhammad Ali, Henry Armstrong and Roberto Duran?
The 32 year old Paulie Malignaggi, (32-5, 7 KO) a professional of 12 years, has faced the likes of Amir Khan, Ricky Hatton, Miguel Cotto, Vyacheslav Senchenko and Lovemore Ndou.
Never at a loss for words, he added:
Courtesy of Showtime
"Me and Floyd are not friends, I don't need to say this if I truly don't believe it." I'm saying it because it is simply the truth. I respect the guy but I don't know him well, I don't owe him any favors, so when I say he's the best ever it's because that's truly what I feel."
"I leaned that way before the Canelo fight, but this kind of convinced me fully," said Malignaggi, still a top contender who also commentates for Showtime and helped call the action for Mayweather vs Canelo.
Known for his grit, polished skills and speedy reflexes, Paulie last fought in June 2013, dropping a spilt decision in a spirited effort against the surging, highly-talented Adrian Broner.
The scores were 115-113, split, and 117-111 for Broner.
After the bout, an animated, ever-candid Malignaggi stated, "Tom Schreck is a New York judge that is in Al Haymon's pocket. 117-111 is a disgrace. I'm not saying it was fixed but the politically more-connected fighter always gets the close decision."
Given Paulie's fight-game experience, pro pedigree and verbal shoot-from-the-hip approach, should we take his assertion about Floyd Mayweather seriously?
And does Paulie's claim give Mayweather's argument (that he is the best ever) added credibility?