This baseball has been personally hand signed by Sandy Koufax, Randy Johnson, Jim Bunning, Roy Halladay, Mark Buehrle, Matt Cain, Felix Hernandez, Don Larsen, David Wells, Len Barker, Mike Witt, Dallas Braden, Tom Browning, David Cone, Philip Humber and Dennis Martinez with the inscriptions "P.G 5-15-81, P.G. 9-16-88, P.G 5/18/04, P.G. 7.18.99, PG 5.17.98, PG 7-23-09, PG 5.9.10, PG 6-13-12, PG. 7/28/91, P.G 9-30-84, P.G. 5-29-10, PG 10.8.56, PG 6/21/64, PG 9/9/65, P.G. 08.15.12." It comes with a tamper-evident label and a certificate of authenticity from PSA/DNA. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud. SportsMemorabilia.com firmly stands behind every product offered on our site with a lifetime authenticity guarantee that each signature is 100% authentic.