Sports / Basketball — The Dallas Mavericks beat the Indiana Pacers 121-105 in Indianapolis on Friday night, but the win came with a scare: Cooper Flagg, the reigning Rookie of the Year and the face of the franchise, landed hard on his left shoulder after a flagrant foul by Aaron Nesmith late in the second quarter and did not return. Head coach Dusty May said Flagg was in good spirits and will be evaluated over the next couple of days, with imaging set to provide the official diagnosis.
INDIANAPOLIS — The Dallas Mavericks won the game and lost their star, at least for the night. Dallas beat the Indiana Pacers 121-105 at Gainbridge Fieldhouse on Friday, the Pacers’ home opener, in a game the Mavericks controlled almost from the opening tip — they led 77-43 at halftime after a 15-0 second-quarter run stretched the margin to 30 points. But the result was overtaken by a single play with 59.7 seconds left in the first half, when Cooper Flagg was knocked out of the air on a breakaway dunk attempt, landed awkwardly on his left shoulder, and was ruled out for the rest of the night with left shoulder soreness. The game report was carried by Reuters via Field Level Media, with further detail from USA Today and the New York Post. Both teams left the floor at 1-1.
The play: a steal, a breakaway, and a flagrant foul
The sequence began with Flagg doing what has made him the centrepiece of the post-Dončić Mavericks: he picked off a pass and took off alone down the floor for what should have been an uncontested breakaway dunk. Aaron Nesmith chased him down from behind and challenged the dunk in the air. Flagg sprawled on the way down and landed awkwardly on his left shoulder near the baseline cameras, in full view of a home crowd that had come to celebrate its own star’s return. After a video review, officials assessed Nesmith a flagrant-1 foul — unnecessary contact, but below the flagrant-2 threshold that would have meant an ejection.
The reaction on the floor was instant. Naji Marshall shoved Nesmith, both players were given technical fouls, and a brief shoving match between the teams had to be separated by coaches and officials before the game could continue. Flagg, to his credit, got up, walked to the line and made both free throws. He was then substituted out, went straight to the locker room, and was ruled out with left shoulder soreness. He did not return. In 17 minutes he had already filled the box score: 14 points, six assists, five rebounds and three steals — the kind of all-around line that has quickly become his normal.
What Dusty May said, and the evaluation timeline
After the game, Mavericks head coach Dusty May offered the only official word there is so far, and it was measured rather than alarmed. Flagg will be evaluated “in the next couple of days,” May said, and imaging will provide the official diagnosis. May added that Flagg was in “good spirits” after the game — a small detail, but the one Dallas fans will hold on to while they wait. Notably, May declined to criticise the player who committed the foul. “Nesmith’s a great guy. Heck of a player. I’ve known him since he was in high school,” May said. “Obviously, an unfortunate play.”
What is confirmed, then, is narrow: a diagnosis of left shoulder soreness, an evaluation and imaging still to come, and no official timetable. Anything beyond that is expectation, and it is worth labelling it as such. Reading the timeline — an evaluation spread over the next couple of days, with a game roughly 24 hours later — USA Today concluded that Flagg is likely to miss Saturday night’s home game against Victor Wembanyama and the San Antonio Spurs. That is a reasonable reading of the calendar, not a team announcement, and Dallas has not confirmed it. A trip to Miami follows on Monday, which gives the club a second decision point if the shoulder needs more than a weekend.
The game itself: a rout, and a homecoming 490 days in the making
Strip away the injury and this was a statement road win. Dallas’s 77-43 halftime lead was built on a 15-0 second-quarter run and a 30-point margin, and Indiana never made the second half uncomfortable. Kyrie Irving led the Mavericks with 24 points before fouling out with 4:23 remaining. P.J. Washington added 20 points and 13 rebounds, Max Christie scored 16, Naji Marshall 15 and Zaccharie Risacher 11. For Indiana, Pascal Siakam scored 23 and Andrew Nembhard 16, with Obi Toppin adding 13 and Ivica Zubac pulling down 11 rebounds.
The night also carried a second storyline that would have led any other game story. Tyrese Haliburton scored 18 points in his first home game in 490 days — his first appearance at Gainbridge Fieldhouse since he tore his right Achilles in Game 7 of the 2025 Finals and missed the whole of last season. The Pacers lost their opener-within-the-opener, but getting their franchise guard back on his home floor, productive and upright, is the development that will matter most to Indiana’s season. Readers tracking the league’s first week can also catch up on the Lakers’ 125-117 win over the Clippers and Boston’s 107-103 win over the champion Knicks.
Why this matters
Flagg is not simply Dallas’s best young player; he is the plan. The 19-year-old was the No. 1 pick in the 2025 draft out of Duke, won Rookie of the Year after averaging 21.0 points, 6.7 rebounds and 4.5 assists across 70 games to lead all rookies in scoring, and opened this season with 32 points in the loss to Houston. For a franchise rebuilding its identity in the post-Dončić era, his availability is the difference between a developmental season and a watchable one — which is why a routine October foul on Friday night immediately became a league-wide story.
The medical distinction that matters is between soreness and structure. “Shoulder soreness” is the softest label the league uses, and players return from it in days. But a fall onto the shoulder at speed, in the air, is also the mechanism behind sprains, separations and labrum problems that imaging is specifically designed to rule in or out. Until the scan results are public, both readings are live, and anyone claiming certainty either way is ahead of the evidence. The same honesty applies to the foul itself. Flagg’s teammates reacted as players do when they judge a play on an airborne teammate to be dangerous, and Marshall’s shove said the quiet part. May, who knows Nesmith personally, called it an unfortunate play rather than a dirty one. The officials, with the benefit of replay, landed between those poles: flagrant-1, unnecessary contact, no ejection. Whether a challenge from behind on a defenceless dunker should ever be a flagrant-1 rather than a flagrant-2 is a genuine debate the league has never fully settled — Friday’s play, and its cost, will be Exhibit A the next time it is argued.
Context: a heavy workload on a thin roster
The scare also lands on a roster that can least afford it. Dallas has carried a long injury list into the season’s first week, and Flagg’s two-way workload — primary creator on offence, disruptive defender at the other end, as his three steals in 17 minutes on Friday showed — is not easily redistributed. His opening-week form underlined the point: 32 points against Houston, then a 14-6-5-3 line in barely a half in Indianapolis. The Mavericks’ other injury story of the week, Paolo Banchero’s ankle exit in Orlando, is a reminder of how quickly the season’s first fortnight has started collecting star names; Dallas will hope Flagg’s entry on that list is the briefest of them.
What happens next
The sequence is now medical before it is basketball. First comes the evaluation and imaging May described, expected over the next couple of days, and with it the first official diagnosis beyond “soreness.” Then comes Saturday night in Dallas, where the Spurs and Wembanyama are the visitors in one of the young season’s marquee matchups — the game Flagg is expected, though not confirmed, to miss. The Miami trip on Monday is the next checkpoint after that. If Flagg sits, expect Marshall, Christie and Washington to absorb his minutes and Irving to carry an even larger share of the creation load, with the rotation tightened around them. And if the imaging comes back clean, Friday will be remembered as a frightening 60 seconds in a 16-point road win — nothing more. Dallas, and everyone who has watched the first week of this season, will be waiting on the same scan.
Sources: Reuters / Field Level Media, “Mavericks beat Pacers, Cooper Flagg leaves with shoulder soreness,” October 23-24, 2026; Reuters / Field Level Media, “Mavericks star Cooper Flagg exits vs. Pacers after hard foul,” October 23-24, 2026; USA Today, “Cooper Flagg injury: Mavericks star exits vs. Pacers after Aaron Nesmith flagrant foul,” October 23, 2026; New York Post, “Pacers, Mavs get into heated scuffle after Cooper Flagg injures shoulder on flagrant foul,” October 24, 2026; theScore game summary. File photos via Wikimedia Commons as credited.