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This baseball has been personally hand-signed by Gaylord Perry. It has been obtained under the auspices of the MLB Authentication Program and can be verified by its numbered hologram at MLB It also comes with an individually numbered, tamper evident hologram from Fanatics Authentic. To ensure authenticity, the hologram can be reviewed online. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud. Gaylord Perry memorabilia. Seattle Mariners memorabilia