For Gardner, Yanks, it's not a 'stache decision

Brett Gardner (right) is trying to convince Joe Girardi to grow a mustache. (Bill Kostroun/AP)NEW YORK -- The fuel for the Yankees' recent winning streak can be traced to a moment of inspiration in a bathroom mirror at Tropicana Field. At least, that's how Brett Gardner tells the story.

Gardner is leading the charge behind a sprouting band of mustaches in the Yankees' clubhouse, most of which have been permitted to take root while the team has reeled off seven wins in eight games going into Saturday's Subway Series game against the Mets.

"It's been going a little longer than you would think," Gardner said. "It takes me a while to get it going, but ever since Tampa, we've just been playing…