autographed Official Mitchell & Ness Jersey of Boston Red Soz Hall of Famer PEDRO MARTINEZ. This jersey is signed with Black sharpie. This jersey is size Extra Large (48) with all letters and numbers sewn in. This item was signed at a private signing with us and would make a great addition to any Martinez or Red Sox collection. This autograph is guaranteed to be 100% authentic and will include a COA from JSA authentication.