Cooper Flagg had 26 points and 8 assists as Dallas handed Oklahoma City its first loss of the season at American Airlines Center.

Kyrie Irving scored 11 first-quarter points, all on jumpers, in his first regular-season home game since tearing his left ACL in March 2025.

Up 65-61 early in the third, Dallas scored 13 of the next 15 points, capped by Daniel Gafford's alley-oop from Flagg for a 78-63 lead.

He shot 10-of-23 with 5 rebounds and no turnovers in 33 minutes. P.J. Washington added 18 points and 9 rebounds.

Dallas made 16 threes, had 30 assists on 46 baskets and outscored the Thunder 17-0 in fast-break points. The lead reached 27.

Without Jalen Williams, Chet Holmgren, Cason Wallace and Alex Caruso, the Thunder made 5 of 32 threes. Ajay Mitchell scored 29 and Shai Gilgeous-Alexander 21.

Dallas (3-2) hosts Houston on Friday at 8 p.m. ET. The Thunder (4-1) visit Houston on Saturday at 8:30 p.m. ET.

Cooper Flagg speaks after the Mavericks' 120-96 win over the Thunder on Oct. 28, 2026. Photo credit: Abby Jones / X video still.

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