This is an Official Major League Baseball that Engel signed in Arizona. This item comes with a PSA/DNA ROOKIE BALL COA. ROOKIE BALL COA'S are very unique, it guarantees that the signature was signed and authenticated prior to the players 1st game of his second MLB season. Having a ROOKIE BALL of a player should make your collection very unique. PSA is the leading authenticator in our industry! Illinois residents must add 7% sales tax.