Rick Harrison, John Mayer's current manager.

John Mayer's manager is currently Rick Harrison who also owns a pawn shop in Las Vegas.

In an interview with Rick Harrison, he is quoted as saying:

"John Mayer? The guy is a complete joke. John wanted a manager and since nobody wanted to manage this asshole, i signed up for the job figuring i could make lots of cash out of John Mayer and his endless gimmicks."