Undefeated Mayweather tackles the Filipino superstar in Las Vegas this weekend in what will be the penultimate assignment of the 38-year-old’s six-fight deal with Showtime.
Toppling Pacquiao at the MGM Grand would register a 48th victory and leave him just one short of equalling Rocky Marciano’s hallowed 49-fight unbeaten mark.
Mayweather’s insistence that he has no desire to eclipse Marciano has been met with widespread scepticism but Arum, who promoted the reigning pound-for-pound king for the first decade of his career, predicts he will call time on his career inside the ring.
“I believe what Floyd is saying in that he is looking towards retirement. He’s been at it since he’s eight years old and he doesn’t enjoy it like he used to,” said Arum, whose??Top Rank are joint promoters for Saturday’s showdown.
“Like Marvin Hagler said, millionaires sleep in silk pyjamas and don’t like to get up in the morning and do roadwork.
“When he retires, I think Floyd will be a great party guy. He’ll have plenty of money and he’ll enjoy himself.
“I just hope that for his sake he settles down and lives a more normal family-type life.”
While September could be Mayweather’s final outing, quite possibly in a rematch against ??acquiao, Arum predicts the Filipino southpaw he has promoted since 2006 will continue fighting until the end of next year.
“Manny still enjoys boxing, but I’d look for him to hang the gloves up in 2016,” Arum said.
“That being said, in 2016 he’ll be running for the senate in the Philippines and that’s much more time-consuming than being an ordinary congressman.”
One opponent Pacquiao is unlikely to face is Amir Khan, with Arum insisting the Briton rejected the fight – “with Khan a lot of it is just talk”.
If the richest fight in history matches expectations or is marred by controversy then a rematch in September is inevitable, even if the prospect of negotiating with Mayweather and his advisors once again fills Arum with dread.
“I’m exhausted from doing this fight, why would you want to punish me again?” said Arum, who has worked with the sport’s biggest names including Muhammad Ali, Joe Frazier and George Foreman.
“I’m 83 years old and have been through the most hellish time of my promotional career.
“If you sentence me to that (a rematch), it will be a cruel punishment, which I’m protected against by the constitution of the United States.
“I’d have to go on a long, long vacation before I could even contemplate a rematch. Who knows what will happen? You never say never.”