He won't fire Garret because these games against the Bears and Rams don't matter. If the Cowboys get blown out by the Eagles then I could maybe see Jerry firing him. But even then, if Eli somehow conjures up some old magic and beats the Eagles, therefore making that match up trivial then he could maybe survive a blow out and make it to week 17. Regardless Garret is done as the Cowboys head coach. Only a SB win saves his job and thats obviously not going to happen.