SUPER RARE 1990 Mark McGwire Error GRAND SLAMMERS,STAR MISSING  The broken line under donruss in the top left corner is the error ,  Rare card . This  card is still factory sealed  & its 1st within a pack of several  cards  to clarify  its new condition. The deal includes the entire pack of  new 1990 donruss cards seen in photo 4 . Some other valuables could be in there . Griffey Jr , Bonds , Bo Jackson & Randy Johnson were rookies in 1990 .