Corey Heim to replace Riley Herbst in 23XI Racing’s No. 35 car next year

23XI Racing announced on May 30 that Corey Heim will replace Riley Herbst in the No. 35 car next year, a move that tightens an already crowded driver market.

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Stephanie Grant
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Sports reporter covering women's athletics, college sports, and the Olympics. Advocate for equal coverage in sports journalism.
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Corey Heim to replace Riley Herbst in 23XI Racing’s No. 35 car next year

23XI Racing announced on May 30 that will replace in the team’s No. 35 car next year, officially naming Heim a full‑time driver.

The move hands Herbst the seat he has occupied and locks a full‑time ride for Heim at one of NASCAR’s highest‑profile teams. Team owner described the change as "part of the plan," framing the decision as deliberate rather than reactionary.

Heim’s elevation matters because there are only so many competitive Cup seats available, and many of them are already spoken for. and Ryan Blaney have both signed contract extensions, and Denny Hamlin, Chase Briscoe and Christopher Bell are committed beyond this season. Ty Gibbs is not expected to be going anywhere, and Bubba Wallace remains in an option year, shrinking the pool of open top‑tier rides.

That crowded marketplace is the friction point behind Heim’s announcement. The team has secured one clear spot, but with key drivers locked up and RFK likely to field just two charters next season, opportunities for other free agents are limited even as teams shuffle lineups during silly season.

Practical details around the announcement are sparse: the team set the change for "next year" and confirmed Heim as a full‑time driver on May 30. The timeline follows a turbulent stretch in the sport—the death of on May 21 left a vacancy beyond a Cup seat—and comes amid continuing owner‑points and charter conversations referenced after the Nashville race on May 31.

Notable absences from the roster dominoes are important. Alex Bowman is the most high‑profile unsigned driver still on the market, while Connor Zilisch is signed through next season and could move early only if another team arranges it. is not expected to change personnel, and ’ Kyle Larson, Chase Elliott and William Byron are signed through next year, narrowing the options for teams chasing experienced Cup talent.

Austin Cindric remains unsigned, a fact that could matter if teams start to reshuffle mid‑level seats; RFK’s likely two‑charter situation also figures into how many Cup‑caliber opportunities surface. For Heim, the announcement secures a seat. For Herbst, it means finding his next step after losing the No. 35 ride.

23XI’s timing is typical of silly season moves: decisive, public and designed to give the team and its new driver time to prepare. But the announcement leaves a definitional gap that will shape the next wave of deals—exactly which calendar season the team means by "next year" in the context of its broader roster plan is not spelled out.

The single most consequential unresolved question is that timetable. Heim is committed to a full‑time role; the remaining question is when teams will finalize the rest of their lineups around that commitment and how Herbst’s vacancy will be filled. Expect more confirmed deals and clarifications on timing as teams adjust to the tighter market.

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Sports reporter covering women's athletics, college sports, and the Olympics. Advocate for equal coverage in sports journalism.