Content is for letters not baseballs, but not in this case! Incredible content written by Numero Uno to his Pirates mentor: "To Mr. Joe L. Brown. I hope Three Rivers Stadium will bring you and our organization as much happiness as Forbes Field and you had brought to me" (across sweet spot). On the side panel is written, "With great respect and admiration Roberto Clemente." Joe L. added later the date it was signed "June 28, 1970" - the day of the last game at Forbes Field. It was spot varnished after that so the date was written right after the signature. This Official National League offering is a cream white ball except for the varnish. Signature overall rates 7/10, one of finest content signed baseball extant.