Wilson A1010 Blem Baseball (DZ)A1010 blem baseballs are perfect for practice and training. Red cushioned cork core gives you a baseball that stays more energized during bat ball collision. These balls are not NFHS stamped. Full grain leather cover. Sold by the dozen What is a Blem? A cosmetic blem or blemish is when there is a minor imperfection somewhere on a bat or ball. There could be a paint discoloration, a paint run, a smudge, logos could be off center, the stencil outline of