Really? Coors Field had veggie hot dogs, burgers, nachos, pizzas, salads and burritos. It was the same throughout my entire trip - from small mountain towns to huge cities, I was amazed by the veggie options available. I've definitely struggled far more in other countries.
I had a similar experience at Coors Field, in Denver, last year. The game was rain delayed by an hour, so we went for a stroll around the stadium and were amazed by the sheer number of food and drink outlets! They even had a Tuaca bar, which only sold Tuaca based cocktails and shots.
Tickets...