Cowboys Mike Zimmer, the former head coach of Vikings, is joining the Cowboys as their defensive coordinator 3 months ago Mike Zimmer has returned to the NFL, the place where it all started. NFL Network Insider Tom Pelissero said that… Enormous Picture: 5 Storylines For Cowboys and Dolphins 5 years ago The Cowboys and Dolphins have all the earmarks of being going in inverse ways. At 2-0, Dallas is probably the…