This 1991 Rookie of the Year Chuck Knoblauch Special Collectors Edition case contains 4 holographic cards that highlight Knoblauch's legendary rookie season with the Minnesota Twins. In his first of 7 years with the Twins he hit 1 homer, 15 RBI's, and .281 Batting Average. Although he wasn't the best at bat, he was prominent on the defensive side at second base, leading the twins to their 3rd and most recent World Series Championship in his rookie season becoming 1 of 5 athletes ever to win a major championship in their rookie season joining athletes like Magic Johnson and Bill Russell. After he was traded to the New York Yankees in 1998, he won 3 more World Series which stamped his legacy in the MLB as an all-time great. A Certificate of Authenticity (COA) is included on the back on the case which is signed by the president of Holoprism.