The Celtics rank 5th in the NBA in offensive rating (115.9), and the Cavaliers rank 12th in defensive rating (110.0). A good spot for the offense against a middle-of-the-pack defense.
League average is 110.9, so the Celtics are 5.0 above it. Jayson Tatum leads them with 27.1 points a game on 57.3% true shooting.