Halfback and defensive back "Lupe Joe" Arenas played for the San Francisco 49ers between 1951 and 1957, and he signed this ultra-rare 4x6" card in blue with the inscription: "Yours In Sports." There's a pinhole on the helmet and small piece of tape on the back, otherwise VG condition. The year of production is not known but this is the only known card that was signed. Arenas' 4,572 career kick and punt return yards was the best in NFL history at the time of his retirement.