This official Schutt NY Yankees Pitching Rubber has been personally hand-signed by 5x World Series Champion, Andy Pettitte. He has added the inscription "96,98,99,00,09 WS Champs" This item was signed in the presence of and witnessed by a representative of James Spence Authentication. It comes with an individually numbered, tamper evident sticker from JSA which can be reviewed online to ensure authenticity. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.