From Was Watching, which originally linked it from law360: (This stuff gets complicated.)
The New York Yankees hold the rights to the phrase "Evil Empire," the
nickname used by their detractors, and can prevent another company from
registering the name as a trademark, a U.S. Patent and Trademark Office
panel ruled recently.
In a Feb. 8 decision, the Trademark Trial
and Appeal Board held that Evil Enterprises Inc. couldn't register a
trademark on the phrase "Baseball's Evil Empire" for use on apparel
featuring the Yankees logo adorned with a devil and pitchfork .
Thus, you cannot associate the Yankees with "Evil Empire," unless you pay them money.
I do, though, like the name of the company: "Evil Enterprises Inc." I always thought that when I started my evildoer business, that would be the name. Damn. Somebody beat me to it.
I wonder what other trademark names the Yankees secretly have. Some possibilities:
Lost Colony of Roanoke.
Apple Dumpling Gang.
Loco Surf Riders from Hell.