This Rawlings baseball has been personally hand-signed by former NY Mets Second Baseman Edgardo Alfonzo with the inscription 1999 Silver Slugger . 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.