This item was consigned by a former equipment manager for the Williamsport Crosscutters. They were the Phillies Single A affiliate while he was there. Zach Green was with the Crosscutters in 2013, and spent 8 games in the major leagues in 2019. We guarantee all uncertified autographs to pass 3rd party authentication with CAS our authenticator of choice. If you want to get autographs certified you need to notify us before you pay. We submit them for you. If an autograph doesn't pass we refund both the purchase price AND the authentication fee.