Blake Stein St. Louis Cardinals 1997 Classic Best Top Prospect Autographed Card - Minor League Card. This item comes with a certificate of authenticity from Autograph-Sports. Autographed. Comes fully certified with a Athletic Promotional Events certificate of authenticity. . If a product is unsigned or non game-used, a hologram will not be included. Blake Stein memorabilia. Kansas City Royals memorabilia.