This 2019 HR Derby Logo baseball has been personally hand-signed by NY Mets SuperStar 1st Baseman Pete Alonso with the 2019 HR Derby Inscription. This item was signed in the presence of and witnessed by a representative of Major League Baseball and Fanatics. It comes with an individually numbered, tamper evident sticker from BOTH MLB & Fanatics 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.