The shorthanded Dallas Mavericks (19-31) looked lost in Tuesday’s 110-100 loss to the Boston Celtics (32-18) at American Airlines Center, extending their losing streak to five games. The Mavericks were without P.J. Washington (head), Brandon Williams (leg) and D’Angelo Russell (illness) and lost big man Daniel Gafford to yet another ankle injury in their latest loss. The night is dark and full of terrors, y’all.

Jaylen Brown scorched Dallas for 15 points and five rebounds in the first quarter, a sure sign of trouble to come. But Dallas countered with the vaunted one-two punch of Cooper Flagg and Caleb Martin, who combined for 15 points of their own in the first to keep the Mavericks’ heads above water, trailing 32-29 after one. Martin found Flagg running along the baseline in transition for a man-sized alley-oop slam less than five minutes into the proceedings to give the Mavs an early 12-9 lead.

Klay Thompson came off a screen near the top of the key for a 3-pointer to tie the game, 32-32, on Dallas’ first make of the second quarter, but the Celtics responded with a little 9-2 run over the next two minutes to force Mavs’ head coach Jason Kidd into his first timeout of the game, trailing 41-34. The Celtics scored the game’s next eight points after the timeout to extend the run and put the Mavs behind the eight-ball midway through the second.

Finally, Flagg drove down the lane and converted a hard-earned leaner in the lane to stop the bleeding, with five minutes left before halftime, but the Mavs were already down 50-36 at that point. Dallas went nearly four minutes without scoring at one point in the second and shot just 7-of-22 from the field and just 1-of-9 from beyond the arc in the period. Boston led 52-44 at the break after letting the Mavs back in it with a 10-2 run late in the second.

Flagg nailed a contested jumper on the Mavs’ first possession of the third to continue that run, but Brown and the Celtics kept the Mavericks at arm’s length throughout most of the quarter. Flagg recorded a highlight chase-down block on a transition attempt from Baylor Scheierman two minutes later, and Max Christie hit his first 3-pointer of the game with 8:20 left in the third to bring Dallas to within 58-51. Luka Garza knocked down back-to-back 3-balls, though, with 3:30 left in the third to extend the Boston lead to 15, up 78-63.

Brown, who entered the fourth with 25 points and 10 rebounds already to his credit, rested to start the fourth quarter, but the Celtics didn’t miss him much. The lead floated near 20 points for much of the final frame. Flagg, however, continued to pour it in for Dallas. He nailed a 3-pointer with eight minutes remaining to give him 33 points and push his season scoring average to just over 20 points per game. He became the only teenager in NBA history to score 30 or more points in three straight games in the loss, and also the first rookie to score 34 or more in three straight since Trae Young did it in 2018. Flagg finished with 36 points, nine boards and six assists, another otherworldly performance in another hopeless Mavericks’ loss.

Brown came into the game with nine minutes remaining, as the Mavs threatened to get back in it, and scored on a forceful drive through the lane to give him a team-high 27 points on the night. He scored another tear-drop in transition over Flagg with five minutes to play to give Boston a 104-89 advantage. He finished with 33 points and 11 rebounds in the win.

All you have to do is watch a few games to realize why, as ESPN’s Shams Charania reported earlier on Monday, Dallas’ phone lines remain “wide open” as the NBA Trade Deadline nears. Why would anyone want any of these guys? Flagg is the only winning player on the Mavericks’ roster at this point, and this team is truly hard to watch in long stretches.

Naji Marshall can’t save you, Mavs fans, even as nice as he’s looked this year. None of the guards are bringing any juice right now. Martin is a starter at this point. What are we even doing here?

The Celtics focused all of their energy on slowing Flagg down, forcing the rest of the Mavs to come to the table with literally anything at all. Most of the time, it just wasn’t there. This season is in the sewer. We are waist-deep in the muck.

Gafford goes down, gets back up

Late in the second quarter, Daniel Gafford, one of the most mediocre trade assets the Mavericks have dangled this winter, went down with an apparent ankle injury while moving into position for a rebound. If there was any hope of getting anything for Gafford before Tuesday’s game, the chances of doing so took a big hit as Gafford writhed in pain in the lane and was helped to the locker room with two minutes to go before the half.

Gafford’s right ankle has given him trouble for most of the season, since he sprained it in training camp and missed the first five games of the year. He hasn’t been right since, and his already modest production has been neutered as a result. He appeared to hurt the same ankle on Tuesday.

It was announced midway through the third quarter that Gafford would be available to return against the Celtics. He came back into the game with 5:18 left in the third quarter for some reason and immediately winced with apparent pain in his right shoulder after grabbing his first rebound of the second half.

Gafford skied for a putback dunk on Thompson’s missed jumper with 2:15 left in the third to get to eight points and eight rebounds in just 17 minutes to that point, perhaps giving potential trade suitors something to think about with his all-out effort in the face of what has been a tough season. He ran through Garza on his way to the bucket with 31 seconds left in the third for a basket that was wiped away on review as the Celtics took an 86-67 lead into the fourth quarter.

The Celtics got 26 points from Peyton Pritchard and 16 more from Garza off the bench while the Mavs searched for any production whatsoever from their beleaguered second unit. Boston’s bench outscored Dallas’ 44-22 and helped the Celtics coast to the win. After the Celtics’ 5-of-20 start from 3-point range, Boston made seven of their next 14 from distance to close out the win. Garza made all four of his 3-point attempts, tying a career-high mark in the win.

No Maverick reserve scored more than seven points in Tuesday’s loss.