The mark comprises a uniquely sector-shaped portion on the back of a jacket extending downwardly from below the neck and radiating outwardly towards either side of the back of the jacket. A generally diamond-shaped portion is positioned inwardly from the top of the sector-shaped portion. A small square is positioned adjacent the two side and bottom apexes of the diamond and a small pentagon is positioned adjacent the top of the diamond. A round baseball is located generally centrally and inwardly of the sides of the diamond. A diamond-shaped portion is located on each of the outer sides of the sleeves of the jacket near the elbow of each sleeve. A smaller, generally diamond-shaped portion is positioned inwardly of the outer diamond shape on the sleeves and a round baseball is positioned inwardly and centrally of the inner diamond.