Commemorate Rob Gronkowski and the New England Patriots winning their 4th Super Bowl with this autographed collectible. This Nike Elite jersey has been personally hand-signed by Rob Gronkowski. It is officially licensed by the National Football League and 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.