Here's some water-is-wet reporting: a couple of solid sources indicate that USC offensive line coach and running game coordinator Tim Drevno will be named Michigan's offensive coordinator in the near future.
This is also being reported by USC reporter Gerald Martinez; it is all over USC paysites; USC OL Zach Banner (remember him?) has tweeted out a farewell.
I am happy for Coach Drev and wish him luck with his new job because he deserves it. He has a great opportunity. I love that guy.
— Zach Banner (@zachbanner73) December 31, 2014
Drevno's history as an OL coach is unquestionably excellent, and he was Harbaugh's offensive coordinator at San Diego.
FWIW, Michigan was high on GA OL Chuma Edoga's list early in his recruitment; he's now a USC recruit.