Luis Severino Autographed/Signed New York Yankees Grey Jersey FAN 43512 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a New York Yankees Grey Jersey that was personally autographed by Luis Severino. Includes a certificate of authenticity from Fanatics Authentication (FAN) and Denver Autographs.