It ain’t Babe Ruth, Mickey Mantle or Willie Mays … no, according to David Ortiz, the greatest baseball player ever is Barry Bonds.

The Red Sox legend made the claim to out in Beverly Hills this week … saying Bonds is his MLB G.O.A.T.

“He’s the best player of all-time,” Big Papi said.

Ortiz added he believes the San Francisco Giants legend is, definitively, a Hall of Famer.

Of course, there’s no denying Bonds is statistically the greatest ever … he hit 762 home runs and stole 514 bases while winning SEVEN MVP awards in his 22 years in the Big Leagues.

The problem … many believed the former outfielder used performance-enhancing drugs to help his game — which is why he still hasn’t been enshrined in Cooperstown

Still, it’s clear Ortiz believes that’s a wrong that needs to righted … and if you’ve seen any sorts of Bonds highlights — it’s hard to argue, right?