NASCAR's most popular driver, Dale Earnhardt Jr, will miss the next two Sprint Cup races due to a concussion. 

According the ESPN, Earnhardt Jr. got the concussion in the massive 25 car pile up at Talladega last weekend.  This pretty much ruins Earnhardt Jr's chances in the Chase for the Sprint Cup championship, as he is already 59 points behind leader Brad Keselowski.

Regan Smith will replace him in the number 88 for the next two races.

Read the entire transcript from Dale Jr's press conference here.