From his radio show on ESPN via Will Cain, on rumors Harbaugh would be interested in the Packers or other NFL jobs:
"I don't know if Jim Harbaugh is ready to leave his alma mater right now, a place that is very special to him, to jump back into the National Football League when he has an 0-fer next to his name against the team down south, and that would be Ohio State. And not having gotten to the college football playoff. So I would disagree, I think Jim Harbaugh is probably in my opinion having just seen him and talking to coaches on his staff a few weeks ago having called Ohio State-Michigan, he's more invested now in Michigan football than maybe he ever has been. Because that 0-fer stings, and I think that drives him more than ANYTHING."
You can catch the audio at the 33:06 mark: https://www.youtube.com/watch?v=jBVLAQvsEYI