This is an Official American League Baseball that has been hand signed by 32 Members of the 1979 Seattle Mariners. There are 32 Total Signatures Including: Darrell Johnson, Vada Pinson, Ruppert Jones, John Montague, Mario Mendoza, Glenn Abbott, Bob Stinson, Leon Roberts, Rick Honeycutt, Joe Simpson, Floyd Bannister, Dan Meyer, Larry Cox, Don Bryant, Willie Horton, Julio Cruz, Odell Jones, Jim Lewis. This item is guaranteed to pass any third party authentication company including Beckett, PSA/DNA & JSA authentication.