Does it mean he will agree not to demand so much money the team will be gutted because it has little money left available to sign other good players?
No, it doesn't mean that at all. The Nationals have a singular advantage that no other team has: they can extend him, now. No other team can even negotiate with him. If he wants long term security now and insurance against a career-ending injury, he would consider an extension. But I doubt that's what he wants right now.
