Why do you call yourself the NFL EXPERT and ask so many questions?
To answer your question, he screwed up with his decision to rest his players last week. And now it is coming back to haunt him. Plus, he wants to go back to his strength the run to set up the pass. If not the Colts are going to just tee off on Plummer and it could get worst. He knows he lost, but he is not trying to get blowout more. That would be disasterous for him and his team.