Abstract: A bowling ball comprises a core surrounded by a cover stock. The core comprises a body with its center positioned substantially coincident with the bowling ball's geometric center and a weight block positioned as close to the outer surface of the bowling ball as possible. The weight block functions as a top weight to offset the mass lost in the bowling ball due to the drilling of gripping holes and balance holes. Furthermore, the weight block provides the three ounce out of balance maximum between the top and bottom of the bowling ball to produce a gyroscopic steering effect which creates a sharp break in the path of the bowling ball at the back end of the bowling lane. The body of the core lowers the moment inertia of the bowling ball to produce a ball with stable rolling characteristics.