The champ is here ... and Andy Ruiz is picking Manny Pacquiao to BEAT Floyd Mayweather if they can work out a deal for a rematch.
After 40-year-old Manny's impressive victory over Keith Thurman this weekend, there's more talk than ever about a Pacquiao vs. Mayweather II.
And since Andy was AT the Pacquiao vs. Thurman fight, we asked the heavyweight champ for his professional opinion ... who wins?!
"I think Manny because hes been more active," Ruiz told us on his way out of Trejo's Tacos in Los Angeles.