DALLAS -- On the first offensive possession of his NBA career, Cooper Flagg pushed the ball down the floor in transition, gave it up to Anthony Davis and soared into the air to catch the lob pass the 10-time All-Star tossed back to him, much to the delight of the sellout crowd at the American Airlines Center.

But Flagg couldn't complete the highlight by throwing down the dunk. As the ball rattled out of the rim, he crashed into the baseline, landing on his backside.

It was a sequence that foreshadowed the No. 1 pick's NBA debut -- a lot of anticipation, but a disappointing result for Flagg and the Dallas Mavericks .

Flagg went scoreless in the first half and finished with 10 points on 4-of-13 shooting as the San Antonio Spurs rolled to a 125-92 rout Wednesday night. The 6-foot

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