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Kurt Busch will miss Sunday’s FireKeepers Casino 400 race at Michigan International Speedway as he is still recovering from a concussion.
Busch was injured after crashing during qualifying on July 23 at Pocono Raceway.
He has missed the last two races with concussion-like symptoms.
Ty Gibbs will replace Busch in 23XI Racing’s No. 45 Toyota.
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“I keep improving every day,” Bush wrote in a tweet on Wednesday. We know, we’re working hard to get back to 100%, thank you for your continued support and look forward to getting back on track soon.”
Bush played Wednesday’s game for Charlotte FC. He was told by doctors to seek stimulation, and he was seen drumming at Bank of America Stadium.
NASCAR reveals why Denny Hamlin’s Pocono winning car was disqualified
23XI Racing said in a statement: “We are looking forward to 100% recovery and getting back on track.
Gibbs finished 17th at Pocono and Indianapolis. Michigan will be his first traditional oval in the NASCAR Cup Series his race.
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Bush is waiving his right to retain his place on the NASCAR playoff field if he qualifies. He has a spot based on his May win in Kansas.
The Associated Press contributed to this report.