Unless it saves them significant money to wait, pulling the trigger after a loss next week at Miami wouldn't be the worst idea. If it were me, I might let him ride it out a bit longer, but with what lies ahead and they way they've played, I don't see an escape route for him this time around (he survived last year, despite ignoring advice to give up the play calling, when he closed out the season strong). But if you want to be sure he doesn't break free again, you can him after the next loss.