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: 51895549 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 Slabbed and authenticated by PSA/DNA; this signed card meets the standard required by dealers and serious collectors alike — with provenance built directly into the encapsulation; learn more about our authentication standard at nicksportsautographs.com/authentication.