Cy Young Autographed/Signed Baseball Jersey Mystery Box with PSA JSA or Beckett COAHere's how it works: You're guaranteed to pull a custom jersey signed by a current or former MLB Cy Young award winner! All jerseys are accompanied with a Certificate of Authenticity from JSA, PSA, Beckett or Fanatics Jersey will be packaged in a sealed and branded HOFSM poly bag to ensure authenticity. You will receive a custom jersey that has no team names, branding or logos. The complete hit list of the Cy YoungBaseball Mystery Box is: Greg Maddux