Here are a couple tips for writing a thesis statement for this particular one:

> Include both “New York Mets” and “New York Yankees” so the reader knows who you’re talking about.

> Make it clear that you are comparing and contrasting the two teams, so the reader knows what to look for.

> A thesis statement is one to two sentences.

> A thesis statemnt is a guide to your whole essay.

> It helps to bettr organize and develop all of your points and your essay.

Here is an example:

The New York Mets and the New York Yankees are New York’s only two professional baseball teams as well as two of the MLB’s best teams, yet they have many differences that make them two great teams.