Yankee fans infatuated with (maybe) Nike ad

In the afterglow of their team's World Series victory, fans of the New York Yankees have been passing around what looks like a Nike ad, listing 15 reasons why the Yankees make their otherwise apparently quite shitty big-city lives bearable. The ad, with an image of Mariano Rivera, is done in the same style as some Nike Sportswear posters seen around NYC during the playoffs, though it's unclear if it's an official Nike creation. There's an apostrophe missing, for one thing.