Cooper Flagg will end up missing his first All-Star weekend after all.

The Dallas Mavericks rookie underwent an MRI on Wednesday that revealed a left midfoot sprain, the team announced. He will now miss the Mavericks’ game with the Los Angeles Lakers on Thursday and won’t participate in the Rising Stars game at the Intuit Dome on Friday to kick off All-Star Weekend in Southern California.

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Utah Jazz forward Ace Bailey, who went just four picks after Flagg in last year’s draft, will replace the Mavericks star in the contest, the league revealed Thursday.

Bailey will slot in on Team Melo with head coach Carmelo Anthony.

Like Flagg, Bailey was a one-and-done in the collegiate ranks. He spent last season at Rutgers and entered the draft as a highly touted prospect. But some pre-draft drama, which later resulted in Bailey parting with his controversial manager, saw him slightly slip to the Jazz at No. 5 overall.

Unlike Flagg, though, Bailey wasn’t necessarily a focal point of his team’s lineup from the jump. While he’s started 37 of the 48 games he’s played in, his usage rate (18.7%) is noticeably lower than Flagg’s (24.7%).

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That said, Bailey has still shown promise, particularly of late. He’s averaging 11.6 points, 3.8 rebounds and 1.7 assists per game while shooting 44.9% from the field, including 34.3% from beyond the arc.

He’s gone for 20-plus points on seven different occasions. Four of those outings have come in the past 12 games.

Recently, the 19-year-old became the youngest Jazz player to reach 500 career points.

Although Flagg won’t get to participate in the weekend’s festivities, his injury arrived at perhaps the best time for the Mavericks. Flagg isn’t expected to miss any further time recovering, according to ESPN’s Tim MacMahon. The Mavericks will return from the All-Star break on Feb. 20 for a matchup against the Minnesota Timberwolves, giving Flagg more than a week to recover.

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Flagg, whom the Mavericks selected with the No. 1 overall pick in the draft last summer, has averaged 20.4 points, 6.6 rebounds and 4.1 assists per game this season. The former Duke standout has shot just better than 48% from the field. Flagg had a game-high 27 points and five assists in Dallas’ 120-111 loss to the Phoenix Suns in Arizona on Tuesday night.

But despite a strong start to his rookie campaign, the Mavericks have struggled lately. The team will enter Thursday’s game at Crypto.com Arena with a 19-34 record. They have lost eight straight and sit 12th in the Western Conference standings, which has them on pace to miss the playoffs for a second straight year.

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As for Bailey’s Jazz, they’re also in the West’s cellar. At 18-37, Utah is 13th in the conference table.

But both of those teams are planning for the future, and their teenage rising stars are at the core of those plans.