Rawlings ROLB2 Official League Practice Baseballs The Rawlings ROLB2 baseball is an Official League baseball which is a great game ball or excellent batting practice ball. This Official League baseball has a leather cover, raised seams for a better grip, a wound solid cork and rubber center, is an official size and weight ball and carries the Official League stamp. Sold and priced per dozen. Center: Wound solid cork and rubber Cover: Full grain leather for added durability Seam: Rawlings Raised Seam Stitch Color: Red Type: Practice/Training