Mark Wahlberg has bet against Floyd Mayweather Jr. before. Back in 2015, he took Manny Pacquiao's side in the Filipino fighter's long anticipated match against The Money Team boss. But then again, Wahlberg was only doing what he had done on numerous occasions prior to Pac-Man meeting up with Mayweather, seeing how he was a regular at The Wildcard Gym for Pacquiao training sessions dating back to fights against Oscar De La Hoya and Ricky Hatton. So it was nothing personal against Floyd then. And it's nothing personal against him now that the actor is rooting for Floyd to lose, once again.

"You see the shamrock?" Wahlberg says during a Showtime presser released to promote this weekend's fight in Vegas. He had just asked Diddy who's side he was on, to which Diddy responded, "Money Mayweather baby!" Of course, flashing the Irish symbolism was Wahlberg's means of saying that he was riding on Conor McGregor's side, being that they share a common ancestry.

The fight between Wahlberg and Diddy on the other hand? Fans who've gotten a look at the Showtime clip aren't shown it, but the music mogul and the former rapper out of Boston appeared to have laced up and gone at it in the ring themselves.

Who would you have in a Diddy vs. Mark Whalberg contest?