In late August, Panini America will begin a sure-to-be-celebrated new chapter in its MLBPA-licensed trading card story with the updated reintroduction of a trading card classic: 2012 Signature Series Baseball. The pioneering product returns to the diamond for the first time since 2001, packing three autographs in every six-card pack and a cutting-edge, personality-driven design that places extra emphasis on the…