No NBA player younger than Cooper Flagg has scored more points than Flagg did on Thursday.

Facing the Charlotte Hornets and his former Duke roommate, Kon Knueppel, Flagg posted a career-high 49 points in a 123-121 loss for the Dallas Mavericks. No teenager has ever scored that many points in NBA history, and it’s also a Mavericks rookie record.

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The latter record was previously co-owned by Flagg and Mark Aguirre. In a fun twist of fate, the Mavericks were retiring Aguirre’s No. 24 on Thursday night.

Knueppel also posted a career high with 34 points on 10-of-16 shooting, including a franchise-record eight made 3-pointers, plus 4 rebounds and 3 assists. In addition to finishing one point shy of 50, Flagg had 10 rebounds and 3 assists while shooting 20-of-29.

The game came down to both players. Flagg tied the game at 121 with a 3-pointer with 34 seconds left, but Knueppel got a steal at his expense on the next Dallas possession and ended up shooting a pair of free throws to take the lead.

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Flagg had a chance to tie the game and hit the half-century mark, but his buzzer-beater missed long after shooting through a double team.

Regardless of the result, Flagg continued to enter rare company at only 19 years old. In addition to having the most points by a teenager, he is now one of three players to post multiple 40-point games at 19 or younger, joining LeBron James and Anthony Edwards.

The win is a welcome one for the 21-28 Hornets, who are now 2.5 games back from the Chicago Bulls for the final play-in spot in the Eastern Conference. Knueppel’s star performance continued a strong rookie year for the No. 4 pick pick, who ranks second among NBA rookies in points per game with 18.9, behind only Flagg.