The 1994 Upper Deck set was issued in two series of 280 and 270 standard-size cards for a total of 550. There are number of topical subsets including Star Rookies (1-30), Fantasy Team (31-40), The Future is Now (41-55), Home Field Advantage (267-294), Upper Deck Classic Alumni (295-299), Diamond Debuts (511-522) and Top Prospects (523-550). Three autograph cards were randomly inserted into first series retail packs. They are Ken Griffey Jr. (KG), Mickey Mantle (MM) and a combo card with Griffey and Mantle (GM). Though they lack serial-numbering, all three cards have an announced print run of 1,000 copies per. An Alex Rodriguez (298A) autograph card was randomly inserted into second series retail packs but production quantities were never divulged by the manufacturer. Rookie Cards include Michael Jordan (as an baseball player), Chan Ho Park, Alex Rodriguez and Billy Wagner. Many cards have been found with a significant variation on the back. The player's name, the horizontal bar containing the biographical information and the vertical bar containing the stats header are normally printed in copper-gold color. On the variation cards, these areas are printed in silver. It is not known exactly how many of the 550 cards have silver versions, nor has any premium been established for them. Also, all of the American League Home Field Advantage subset cards (numbers 281-294) are minor uncorrected errors because the Upper Deck logos on the front are missing the year "1994".