LA is a good team that has it's struggles right now. But let's go ahead and extend this: If Rush goes on and has a good game against the Eagles and wins, do you think Prescott's job security isn't on the line?
Even IF Prescott got his job back after that, the leash would be a lot shorter because the QB behind him would have lead the Cowboys on a win streak recently. Prescott didn't have this type of pressure beforehand. The fact this is even a debate says a lot about Prescott, a QB taking up 20% of the cap shouldn't even have debates like this happening.