An alarming trend will be making an appearance at many of America’s baseball parks on Opening Day this year. Along with the usual festivities synonymous with this rite of Spring-the first pitch of the season, the crack of the bat, kids sitting in the stands with glove in hand, hoping to catch a foul ball-comes the prospect of a not-so-obvious threat to our nation’s health: the compounding of our already out-of-control obesity epidemic. And the marketing geniuses behind America’s big league parks are the culprit. In their quest to fill empty seats of under performing teams, they have embraced a new tool: offering unlimited food and drink for a price. At most participating parks, fans paying an extra premium can consume unlimited hot dogs, nachos, popcorn, soda and water. (Beer and desserts are extra).