Fat Joe appeared on Angie Martinez's cable show the Untold Stories of Hip Hop on Thursday night and gave details about his past beef with Jay-Z. It turns out, the beef was all about basketball, specifically Harlem's famous Rucker Tournament.

Joe coached a team at the Rucker and won a bunch of championships. Then Jay-Z organized a team to hopefully snatch one of those titles, which angered the Bronx rapper.

"Jay-Z's the richest guy in the world. He got everything in the world. The one thing that I love is the Rucker," explained Joe. "So one year, Jay Z decides to put a team at the Rucker. I won six championships out there. I'm 99 and one. This is my baby. I felt, why do they want to come to my park and take my little crown that I got?"

You check out Joe's interview below.