What had Tony never experienced before coming to the US?

Tony had never experienced a baseball game before coming to the US, which reflects the cultural significance of baseball in American society. This sport is deeply ingrained in American history and is often referred to as America's pastime. Unlike concerts, theater performances, or basketball games, baseball is uniquely tied to specific traditions and regional loyalties that many Americans grow up with. The experience of attending a baseball game typically involves not just the sport itself but also the environment, the food, and the cultural rituals associated with it, making it a quintessential American experience.

The other options may also be popular activities, but baseball uniquely represents an iconic aspect of American culture in a way that sets it apart. Thus, Tony's lack of exposure to a baseball game before his arrival highlights his unfamiliarity with an essential part of American leisure and social life.