Description Mike Mussina is a Baseball Hall of Famer; one of the most dominant pitchers of his era with the Baltimore Orioles and New York Yankees. Hand signed and autographed by Mike Mussina on a PSA/DNA-slabbed signed baseball card Authenticated by PSA/DNA; the most trusted third-party autograph authentication service in the hobby PSA/DNA Certification Number: 51895546 Verify authenticity instantly at psacard.com Please note: PSA/DNA no longer issues physical certification cards. Authentication consists of the tamper-proof PSA/DNA holographic sticker and a permanent digital COA in their online database Ships free within the United States; carefully packaged to ensure safe arrival A PSA/DNA-slabbed signed trading card combines the protection of professional encapsulation with a directly verified autograph — one of the most compact and widely collected formats in the hobby; learn more about our authentication standard at nicksportsautographs.com/authentication.