Welcome to the Fanatical and Lucrative World of Baseball Card Design

Toward the end of my call with New York artist Blake Jamieson, I could hear the unmistakable rattling of a spray can ball bearing, followed by a serpentarium’s worth of hisses. Jamieson was cranking out a last-minute portrait of some friends who were coming over for a dinner party later that night, and our conversation about his work with a...