Cowboys Mike Zimmer, the former head coach of Vikings, is joining the Cowboys as their defensive coordinator 10 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…