Fat Joe Ripped For Rocking Timberlands On Mound Before World Series Game 3

Fat Joe turned Yankee Stadium into a concert prior to Game 3 of the World Series ... but his performance might've resulted in more work for the grounds crew -- 'cause the rap legend rocked Timberlands on the mound. The Bronx native hit the diamond and put on a show before first pitch ... with renditions of "New York" and "All The Way Up." Joe sported a Yankee cap and jacket for the mini-set ... but what also…