The artist is likely J.C Leyendecker. He was active during Johnson's era and specialized in Advertising art relating to men's fashion. Legendary auctions (see below) sold an item with the same image as part of a fabric catalog circa 1910. Whatever it is, it is very attractive example of baseball and advertising art from one of my favorite American illustrators congratulations on a great pick up and good luck with it.
http://www.americanartarchives.com/leyendecker,jc.htm
http://www.legendaryauctions.com/Lot...px?lotid=45003