The Celtics need a jolt to their system. They are somehow still trying to find that electric shock that resets their heartbeat and makes them steady not just day to day, but quarter to quarter; lineup to lineup; even possession to possession.



There is an arrhythmia that has defined this team more than anything, but the diagnosis is so elusive that everyone with the power to change it has their palms in the air.



“If I was dead sold that a combination change would give us a jolt, we would have done it a long time ago,” Brad Stevens said after a comeback against the Houston Rockets fell short, 115-104, on Sunday. “Our starts have been good. Our bench up until this little five-game stretch had really improved playing together and still have had moments. We all just have to play better.



“If the right thing to do is to tweak that, we’ll tweak it and we’ll try anything. But we need to fix our play no matter what part of the game...