Matt Cain Autographed San Francisco Giants Ticket MLB Debut BAS Slab 25229 This is an official ticket from August 29th 2005 between the San Francisco Giants and Colorado Rockies that was personally autographed by Matt Cain with MLB Debut 8/29/05 inscription. This is the exact item that you will receive so please see scans for condition. This has been slabbed by Beckett Grading Services (BAS) and includes a certificate of authenticity from Denver Autographs.