Western Michigan had been shopping for a new head coach on Michigan's staff. Both Mike Hart and Jay Harbaugh were interviewed, co-OC Sherrone Moore declined (he makes more as an OC at Michigan). The Bronco's ended up not gutting Michigan's staff but grabbed the Louisville OC.
Did you mention Louisville? Their head coach left after some poor results and took the Cincinnati job. Another place Michigan staffers could have ended up. Now UC and WMU are off the board.
Louisville tried to hire Jeff Brohm a few years ago and he turned it down. He takes the Boilermakers to the Big Ten Championship game this season, his team plays very well, and they lose by 3 TD's.