These game-used gloves were worn by Gary Sanchez during the 2017 MLB season. They were obtained under the auspices of the Major League Baseball Authentication Program and can be verified by its numbered hologram at MLB.com. They also come with a hologram from Steiner Sports and a certificate of authenticity. 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.