From Cubs.com:

The Cubs’ roller-coaster ride with Zambrano came to an end Thursday, when the team dealt the volatile right-hander to the Marlins for fellow righty Chris Volstad.

Zambrano, 30, waived both his no-trade clause and the $19.25 million option for 2013 to join good friend and Venezuelan countryman Ozzie Guillen, the new Marlins manager, who will try to keep the pitcher’s emotions in check.

Emphasis mine because I want you to notice that the Marlins are calling on one Ozzie Guillen to keep Zambrano’s emotions in check. Guillen. Zambrano. In check.

Awesome.