Cooper Flagg, Western Conference Rookie of the Month for December

The Dallas Mavericks’ sensation, Cooper Flagg, has captured the Western Conference Rookie of the Month title for December, successfully replicating his November triumph. He becomes just the third player in Mavericks franchise history to secure back-to-back honors. Selected as the 2025 Draft’s first overall pick out of Duke, the 6-foot-9 forward is validating every single high expectation. Across thirteen December contests, Flagg averaged 23.5 points, 6.2 rebounds, 4.8 assists, plus one steal and one block in 35.6 minutes, while shooting 51.6% from the floor and 80.8% on free throws.

His aggregated monthly numbers—306 points, 80 boards, 63 assists, 13 steals, and 15 blocks—thrust him into an exclusive tier. Historically, only Blake Griffin, LeBron James, Ron Harper, and Larry Bird had previously exceeded 300 points, 75 rebounds, 50 assists, 10 steals, and 10 blocks in one month as rookies. By the numbers, this phenomenal NBA career start is already making history.