The Celtics are all business, all the time

Photo by Jesse D. Garrabrant/NBAE via Getty ImagesThe Boston Celtics don’t care.

Oftentimes, it’s their on-court passiveness that stands out most. A lackadaisical effort in Game 1 against the Philadelphia 76ers. A careless performance against the Houston Rockets in the middle of March. A lifeless loss to the Washington Wizards that ended their chase for the one seed.

But simultaneously, their off-the-court stoicism has bode them well.

After their disastrous Game 1 performance against Philadelphia, the Celtics were disappointed—but they weren’t panicking. They remained calm, focused, and determined to make things right.

“Obviously, when you lose, you always feel like you can play better,” Jayson…