Contreras played his seventh big league game .
Contreras hit his third home run and smacked a game - winning RBI single in the seventh to lift the Cubs to a 5 - 4 victory over the Marlins and snap a four - game losing streak .
Playing his seventh big league game , Contreras hit his third home run and smacked a game - winning RBI single in the seventh to lift the Cubs to a 5 - 4 victory over the Marlins and snap a four - game losing streak .