Via the Chicago Tribune, this happened today:
A goat's head was delivered to Wrigley Field this afternoon, addressed to Cubs owner Tom Ricketts, a team spokesman said.
A package with a goat's head was dropped off at Wrigley, 1060 W. Addison St., addressed to Ricketts, Cubs team spokesman Julian Green said.
The package was dropped off at Gate K at the field, Green said. The delivery was reported to police, he said.
Police News Affairs had no immediate information.