Is Cooper Flagg playing tonight vs the Boston Celtics? Latest update on the Dallas Mavericks star's injury report (March 6, 2026)

Cooper Flagg is expected to play when the Dallas Mavericks face the Boston Celtics on March 6, 2026, at TD Garden. The rookie returned from injury a day earlier and will likely be available again for the second game of Dallas’ back-to-back.The game will also serve as a homecoming for Flagg. The Maine native will play in Boston for the first time in his NBA career while the Mavericks try to end a five-game losing streak against one of the Eastern Conference’s strongest teams.

Dallas Mavericks vs Boston Celtics game details and team form (March 6, 2026)

The Dallas Mavericks (21-41) visit the Celtics (41-21) at 7:00 PM ET. The game will be broadcast on ESPN.Boston enters as a heavy favorite. Simulation models place the Celtics’ win probability at 80.1%.

Boston also holds an advantage in key team statistics. The Celtics average 42.4 rebounds per game compared with Dallas’ 36.8 and commit fewer turnovers.

Dallas has struggled recently, losing five straight games. The team continues to rely on veterans such as Klay Thompson. Kyrie Irving remains out for the season following knee surgery.

Cooper Flagg’s injury timeline and return

Cooper Flagg missed eight games after suffering a left midfoot sprain in February during a game against the Phoenix Suns.

The injury kept him sidelined through the All-Star break.He returned to the lineup on March 5 against the Orlando Magic. In 26 minutes, Flagg recorded 18 points, five rebounds, six assists, and four blocks. Dallas lost the game 115-114.During that game, Flagg also reached 1,000 career points. The basket made him the second-youngest player in NBA history to reach the milestone. The Mavericks’ latest injury report lists him as available for the game in Boston.

Dalas Mavericks injury report and roster availability (March 6, 2026)

While Flagg is available, several other Dallas players appear on the injury report.Daniel Gafford and Marvin Bagley III are both listed as doubtful. Klay Thompson and Brandon Williams are listed as probable.The active rotation includes Flagg (No. 32, forward), Naji Marshall, and P.J. Washington. Dereck Lively II remains out following foot surgery. Tyler Smith is listed as questionable on a two-way contract. Luka Dončić is no longer on the roster following an earlier trade.

Cooper Flagg’s impact this season

Cooper Flagg has become a central part of Dallas’ lineup this season. He is averaging 20.3 points, 6.6 rebounds, and 4.2 assists per game.His defensive production has also stood out. The four blocks he recorded against Orlando highlighted that part of his game. His performance this season has placed him in the Rookie of the Year discussion.

Boston Celtics roster notes

Boston enters the game as one of the top teams in the Eastern Conference. The roster includes Jayson Tatum, Derrick White, and Nikola Vucevic.Also read: Dallas Mavericks vs Boston Celtics injury report: Who's playing, injured and questionable players, head-to-head records, team stats, and more (March 6, 2026)Tatum could return from a recent absence for this matchup. If he plays, the game will feature a matchup between Tatum and Flagg as Dallas attempts to stop its losing streak.