The 1990 Upper Deck set contains 800 cards, issued in two series: Low Series (1-700) and High Series (701-800). High Series packs contained a mixture of Low and High numbered cards. The card fronts are non-glossy have a color player photograph with white borders. The card backs have a color player photograph, recent player stats, and an anti-counterfeiting holograph. The cards are printed on thin, white card stock. Team Checklist cards, featuring original artwork from Vernon Wells, Jr., and Star Rookie cards are scattered throughout the set. Cards sequentially-numbered in multiples of 100 are checklists.
Rookies include Juan Gonzalez, David Justice, Ray Lankford, Dean Palmer, Sammy Sosa, and Larry Walker.
Upper Deck introduced the "Find The Reggie" campaign. Playing on the various insert sets of the past, Upper Deck developed the ten-card Reggie Jackson Heroes set and randomly inserted them into the High Series packs.
In addition, Upper Deck had Jackson autograph 2500 cards that were also inserted into the High Series packs -- the first autographed inserts.
