The Boston Celtics are gearing up for an exciting rematch against the Dallas Mavericks, a game that brings extra weight as a repeat of last season’s NBA Finals.

Nico Harrison and the Mavs were at the root of this year’s trade activity, doubling down defensive priorities.

The final numbers from trade-deadline time: no fewer than eight current and past All-Stars, some of them recent All-NBA selections, some among the league’s highest scorers and even three Olympic gold ...