Bert Blyleven “HOF 2011” Signed Minnesota Twins Nike Replica Jersey (Beckett)This autographed Nike jersey has been personally hand signed by Bert Blyleven (HOF 2011 inscription) of the Minnesota Twins. This autograph is certified by Beckett Authentication Services (BAS) Witness Certification. That means that a Beckett representative was present when this item was signed. It comes with the numbered authentication hologram with a QR code card that verifies the authentication on the Beckett website.