The Minnesota Vikings have replaced one defensive-minded head coach with another one. Mike Zimmer, passed over for top coaching jobs for many years, finally has his chance to run a team. NFL coaching shake-upLatest news:» Pettine hired by Browns as next head coach» Titans hire Horton as defensive coordinator» Vikings introduce Zimmer as new coach» Jets, Rex strike contract extensionVideo:» Can Zimmer cure Vikings' defensive
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