A Tribute to Baltimore Orioles Heroes 8 1/2 by 11 inch commemorative card sheet distributed by Upper Deck exclusively at the April 21, 1991 Orioles home game, autographed in black or blue marker by Paul Blair (deceased), Boog Powell and Hall of Famers Robin Roberts (deceased), Brooks Robinson and Earl Weaver (deceased). (Blair, Powell and Robinson formed the core of the Orioles 1969-1974 dynasty that Weaver managed to five AL East titles in six years, including three AL pennants and one World Series title.) Completely signed sheets are extremely rare. All autographs obtained in person. Authenticated by JSA with their matching numbered sticker on the sheet and certificate of authenticity card. ONLY ONE LEFT.