A key to Michigan’s highly rated defense the last three years has been continuity of scheme, despite having two different coordinators. Now, Don “Wink” Martindale, who spent a decade with the Baltimore Ravens and is one of the architects of the defense installed at Michigan, will run the defense as Michigan’s defensive coordinator. A source familiar with the situation confirmed Martindale’s expected hiring to the Detroit News. The news was first reported by ESPN’s Adam Schefter early Friday morning. Martindale, 60, had been a defensive coordinator in Baltimore and more recently with the New Yo…