Kurt Busch will miss the start of the NASCAR playoffs as he deals with concussion-like symptoms that have kept him off the track for six weeks. 

23XI Racing, the team Busch drives under, withdrew his medical waiver on Thursday. Busch’s injury stems from a crash during a qualifier at Pocono Raceway on July 23.

"As much as I wanted and hope to be able to get back in the No. 45 car to make a playoff run with our team, it’s still not the right time for me," Busch said in a statement on Twitter. "In addition to not being cleared to return to racing, I know that I am not ready to be back in the car.

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"I respect the sport of NASCAR, my fellow drivers and the fans too much to take up a playoff spot if I know I can’t compete for a championship this season. The decision was not an easy one, but I know it is the right thing to do."

The decision to pull Busch now opens up two spots in the 16-car playoff field with the regular-season finale to be raced at Daytona on Saturday night

Kurt Busch's car

Kurt Busch, driver of the #45 SiriusXM Radio Toyota, drives during the NASCAR Cup Series Ambetter 301 at New Hampshire Motor Speedway on July 17, 2022 in Loudon, New Hampshire. (James Gilbert/Getty Images)

Busch would have been racing in his 10th consecutive playoff had he not been injured. Now, fellow 23XI teammate Martin Truex Jr. has a real shot at making that playoff, as he had been battling Ryan Blaney for the final slot. Results at Daytona could vault him into contention there. 

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Kurt Busch and Martin Truex Jr.

Kurt Busch, driver of the #45 SiriusXM Radio Toyota, (L) and Martin Truex Jr., driver of the #19 Interstate Batteries Toyota, talk on the grid during qualifying for the NASCAR Cup Series Ambetter 301 at New Hampshire Motor Speedway on July 16, 2022 in Loudon, New Hampshire. (Tim Nwachukwu/Getty Images)

In Busch’s absence, 19-year-old Ty Gibbs has replaced him, driving his No. 54 Toyota. 

Despite not being in the driver’s seat, Toyota Racing Development President David Wilson said they will be consulting Busch throughout the playoffs. 

"While we’re disappointed that he won’t get the chance to compete for the 2022 championship by missing the start of the playoffs, his well-being is the only thing that matters to us," Wilson said. 

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Kurt Busch posing with car

Kurt Busch, driver of the #45 SiriusXM Radio Toyota, waits on the grid during practice for the NASCAR Cup Series Ambetter 301 at New Hampshire Motor Speedway on July 16, 2022 in Loudon, New Hampshire. (Tim Nwachukwu/Getty Images)

NASCAR has stated that Busch’s No. 45 car is still eligible for the owner’s championship. 

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"I will continue to take time to heal and strengthen as I prepare to be back in the car, and will do all I can to help 23XI continue the success we have had this season," Busch said. 

The Associated Press contributed to this report.