Diamondbacks' Zac Gallen takes shot at MLB executive Michael Hill over foreign substance ban | CBS Sports Headlines Diamondbacks' Zac Gallen takes shot at MLB executive Michael Hill over foreign substance ban Gallen and Michael Hill spent time together while with the Marlins ESN FeedsThis post was originally published on … Continue reading Diamondbacks' Zac Gallen takes shot at MLB executive Michael Hill over foreign substance ban