Celtics hold off desperate Mavs, go up 3-0 in Finals

Boston Celtics forward Jayson Tatum (0) battles for the ball against Dallas Mavericks center Dereck Lively II (2) during the second quarter during game three of the 2024 NBA Finals at American Airlines Center on Jun 12, 2024 in Dallas, Texas. (Stacy Revere/Pool Photo-USA TODAY Sports)

DALLAS — For all the fretting over Kristaps Porzingis’ ailing legs, Jayson Tatum’s so-so shooting and the cakewalk that led them to the Finals, the truth of the Boston Celtics is this.