1946 Bill Kennedy JD McCarthy Postcard Printing Block MLB Baseball Vintage1946 Bill Kennedy JD McCarthy postcard printing block JD McCarthy postcards were a popular postcard and exhibit card manufacturer. This block was used as a template to print images on postcards William Gorman Kennedy was an American professional baseball pitcher. A left hander and native of Alexandria, Virginia, he appeared in 31 games over parts of 3 seasons (1942, 1946 1947) with the Washington Senators Excellent condition; minor wear on player,