We all know that no team in the history of the Association has recovered from a 3-0 deficit, so unless you think these Mavs are basketball’s answer to the 2004 Red Sox (Luka Doncic as Curt Schilling?), you can make arrangements for the parade.

The Celtics are 15-2 in these playoffs and will take a 10-game winning streak into Friday’s Game 4 in Texas. They are on the cusp of completing one of the most dominant seasons in NBA history. This will be Boston’s 18th championship, putting the C’s back ahead of the Lakers and their 17, and perhaps only the second time the Celtics have swept an NBA Finals. (Bill Russell and Co. did it to the Minneapolis Lakers in 1959.)

It’s almost official, Celtic fans: Seven years after Danny Ainge drafted Tatum to pair with Brown, the Jays are finally going to win a championship. They’ve been to the conference finals five times. This is their second NBA Finals. Now is their time.

When Game 3 was over, Tatum and Brown embraced on the court.

“I told him I was proud of him and he said the same thing,” reported Tatum.

Game 3 was played on the 13th anniversary of Dallas’s lone NBA championship, when Dallas coach Jason Kidd was a veteran guard for coach Rick Carlisle, and the 40th anniversary of Boston’s Game 7 victory over the Lakers in 1984 (a.k.a. Cedric Maxwell’s “Hop on my back!” game).

The Celtics trailed, 25-12, in the first quarter, cut it to 1 by intermission, then seemingly blew it open with a hail of threes late in the third. An emphatic Darryl Dawkins-like drive and slam by Brown in the closing seconds of the quarter made it 85-70 after three, and Boston’s lead swelled to 21 one minute into the fourth.

Incredibly, it was down to 93-92 with three and a half minutes left. Fortunately for Boston, Doncic (27 points) fouled out (via a blocking foul on Brown) with 4:12 left. Kidd challenged the play, but the call was upheld.

“We couldn’t play physical,” complained Doncic. “I don’t know . . . six fouls in the NBA Finals . . . C’mon man. Better than that.”

It was only the fourth time in Doncic’s NBA career that he fouled out of a game.

There was considerable pregame conversation regarding the shooting slumps of superstars Irving and Tatum. Irving endured two stink bombs in Boston, missing all eight of his threes, averaging a mere 14 points, and shooting 35 percent. Tatum shot 32 percent in the two games at home.

When Celtic coach Joe Mazzulla was asked if we are seeing the best version of JT, the ever-combative coach asked the reporter if he lived in Brazil or America. When the reporter stated Brazil, Mazzulla said, “That’s probably why you asked that question. None of the American ones did. They look at the lens differently . . . In America, nothing is ever good enough.”

OK. Swell, coach.

Tatum responded with a 13-point first quarter, his best of the series, and 20 in the first half.

On the other side, Irving came into the game unusually humble and contrite, telling reporters, “It’s my fault. I’m taking accountability for not playing particularly well.’’

He scored the first bucket of the night, 14 seconds in. Dallas went up, 9-2, and Mazzulla needed a timeout inside two minutes of play. The Celtics started 1 for 7 from three, and Xavier Tillman came in to replace Al Horford. Boston trailed by 13. It felt like they might be routed.

Not so. Sam Hauser came off the pine to hit a couple of threes and Tatum went off for 13, including a cherry-pick sneakaway, as Boston closed the first quarter with an 18-6 run to cut it to 31-30.

The Celtics led, 91-70, when Dallas went on a 22-2 run, capped on a basket by Irving. Unfortunately for Dallas, Doncic was gone. Boston’s lead proved simply too big to fail.

“You were going to expect a run from them because they had a 19-point [third] quarter,” said Mazzulla. “And just the type of shots they take alone, you knew they were going to make some kind of run.”

“It’s not over till it’s over. We just got to believe,” said Yogi Doncic. “Like I always say, it’s first to four. We’re going to stay together. We lose together, we win together.”

Message to Celtic fans: There’s still time to catch a flight to Dallas-Fort Worth and score tickets to Game 4. The Big D’s resale market should be pretty reasonable.

Pack your brooms.

Dan Shaughnessy is a Globe columnist. He can be reached at daniel.shaughnessy@globe.com. Follow him @dan_shaughnessy.