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HUMBL Authentics Proof of Ownership for Ke'Bryan Hayes autographed black custom baseball jersey. We are the exclusive provider for all Ke'Bryan Hayes signed memorabilia. These jerseys are signed in black sharpie. All jerseys are adult size XL. All letters and numbers are sewn on. These jerseys are authenticated by Beckett with their QR code sticker. Beckett is one of the leading authenticators in the memorabilia business. Buyer will receive an airdropped BLOCKS Certificate of Registration.