Is this my team?

The World Series is going on. I think. And the... NFL.. has started? I was moderately interested in sports when in Sweden. Knew the basics, followed the major events (World Championships in Soccer, the Olympic Games...) and knew the major Swedish teams in ice hockey and soccer (Heja Hammarby!). Now when I live here I'm completely lost... I look at the sports section in the newspaper and it's more like reading Chinese... I worry for our kids, do we need to get them a support family so they'll pick up the basics of American sports and won't be left out at Monday Night Football?

I think this is the top I'm supposed to wear?