Ian Happ Autographed Chicago Cubs Ticket First MLB Grand Slam BAS Slab 25253 This is an official ticket from June 13th 2017 between the Chicago Cubs and New York Mets that was personally autographed by Ian Happ with First MLB Grand Slam 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.