The Canadian singer's first baby, a boy due on August 21, already has a powerful kick, according to Michael's gorgeous Argentinian wife Luisana Lopilato.
Michael, 37, told The Sun: "I used to play soccer when I was younger so I'd be thrilled if he grew up to be a footballer. And who's better than Becks?
"It's my wife's dream as well. She called yesterday to say she felt the baby kick for the first time. She thinks he's got a future with her favourite team, Club Atletico River Plate in Buenos Aires.
"We are both excited, it's brought us closer together and I think that's reflected in my music."
Michael married Luisana, 25, in Buenos Aires in March 2011. He first met the actress, model and singer - who is more famous than Rihanna in her home country - in 2008, backstage at one of his shows.
Michael, who is in London to promote his new album, To Be Loved, out on April 15, said family is hugely important to him.
He said: "I'm close to my sisters, my mum, dad, grandpa and grandma. When I am away we Skype all the time. I sat in my hotel room here and connected with them while they had their Easter dinner at home in Vancouver."
He is particularly close to his grandfather Demetrio Santagà, who he calls 'Grandpa Mitch', and who helped launch Michael's singing career. The Italian swapped his plumbing services for singing lessons and stage time for his teenage grandson.
"Grandpa is awesome," said Michael. "Without him I wouldn't be here. He'd go to guys' houses and fix stuff for free if they let me get up on stage with them. That's how it started.
"He's 85 now. I talk to him daily wherever I am. My dad, too."
He and Luisana are determined to keep Bublé junior's feet on the ground, so that he never takes their wealth for granted.
"Entitlement is a very big concern for Lu and I," Michael revealed. "Entitlement is one of the ugliest traits in human beings and we talk about it a lot.
"It will be impossible for him to grow up in a 'normal' way because he will travel on jets, dine in fancy restaurants and meet famous people.
"But what Lu and I have in common is that we were both raised by families who are very down to earth. So I think him being around people like my mother and father and Lu's mother and father will bring a sense of normality.