Bernard Purdie reveals he was the one actually playing drums on 21 of The Beatles songs and that Ringo Starr was a fraud. He said the Beatles albums were shipped to America to be fixed by him and others.
Quincy Jones has said similar things about Starr and the Beatles. Jones said they were the worst musicians in the world.

This is what Quincy Jones said about the Beatles and Ringo Starr in particular...

Jones thought the Beatles were terrible musicians.

"Paul was the worst bass player I ever heard. And Ringo? Don't even talk about it,"' Jones said, calling the legendary band "no-playing motherfuckers." The mega-producer singled out Ringo Starr, who he worked with on his solo album. "I remember once Ringo had taken three hours for a four-bar thing he was trying to fix on a song. He couldn't get it. We said, Mate, why don't you get some lager and lime, some shepherd's pie, and take an hour-and-a-half and relax a little bit.' So he did, and we called Ronnie Verrell, a jazz drummer.
Ronnie came in for 15 minutes and tore it up. Ringo comes back and says, 'George, can you play it back for me one more time?' So George did, and Ringo says, 'That didn't sound so bad.' And I said, 'Yeah, motherfucker because it ain't you. Great guy though.