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NASCAR driver Dale Earnhardt Jr. will be missing two races after an injury.
In a press release issued on Thursday, Hendrick Motorsports says Earnhardt will miss NASCAR Sprint Cup Series events at Charlotte Motor Speedway and Kansas Speedway.
This is due to being diagnosed with a concussion following the 25-car pileup on the last lap of Sunday's race in Talladega.
Because he was able to drive his car away from the accident, Earnhardt was not required to go to the care center for an examination at the time.
The concussion diagnosis was made Wednesday afternoon in Charlotte.
The injury ends NASCAR's most popular driver's championship chances this season. By sitting out the next two races, he'll most certainly finish last in the 12-driver Chase race.
Regan Smith will be the team's substitute driver in the No. 88 car during the races at the Charlotte Motor Speedway and in Kansas.
That move will give embattled race car driver AJ Allmendinger his first race back on the track since he was suspended for drug violations in July.
Phoenix Racing called Allmendinger on Thursday and asked him to report immediately to Charlotte Motor Speedway to drive the No. 51 Chevrolet. That was the car Smith was slated to drive before Earnhardt's injury.
Allmendinger was suspended after failing a random test for turned out to be Adderall, a prescription drug typically used to treat attention deficit disorder.
He was reinstated by NASCAR last month and is looking for a job for 2013 after being dropped by Penske Racing three months ago.