Dozens of fans milling around Causeway Street were wearing Mavericks jerseys and Celtics hats before Boston hosted Dallas. They were neither confused nor undecided. Nearly all of those Dallas jerseys had “Flagg 32″ on the back.

Cooper Flagg might be an NBA rookie, but his comment on Mavericks head coach Jason Kidd's playing days has fans buzzing.

Dallas Mavericks forward Naji Marshall shows how he’s honoring Cooper Flagg ahead of the rookie’s Boston homecoming against the Celtics.

On Friday, Mainers packed TD Garden to see Cooper Flagg and the Dallas Mavericks take on the Boston Celtics. Flagg finished with 16 points, eight points, and six assists in a 120-100 Mavericks loss to the Celtics.

After growing up as a Celtics fan, the Newport native got his first chance to play in their home arena, and acknowledged it was a 'special' experience.

Cooper Flagg became the second fastest player in NBA history to reach 1,000 points in his return from injury.

The 19-year-old from Newport, Maine, played at TD Garden for the first time on Friday, March 6, 2026. These are today's mortgage and refinance interest rates. A disappointing jobs report released Friday may relieve the upward pressure on mortgage rates. The Bills got a big upgrade at receiver with Thursday's trade.