Friday is the right day to make the move, when you have 15 days between games to let the walls fall down, and then let the dust settle. Doing it today, with a short week could be a mess.
But at the same time, perhaps you give him until Saturday following Nebraska. Who knows.
Although it is only 8 days, I think Friday after the OSU loss will be right. Make an interim move for the Nub game and get started fast on the HC search while you still have a little head start.
Of course if they somehow miraculously win at OSU, he will get another week.