Dale Earnhardt Jr. is done in NASCAR for the rest of the season, Hendrick Motorsports announced on Friday. Earnhardt Jr. suffered a concussion in a crash in July and has been out of action since while receiving treatment.

"I wish I could return to the No. 88 team this season," Earnhardt said in a statement. "To say I'm disappointed doesn't begin to describe how I feel, but I know this is the right thing for my long-term health and career. I'm 100 percent focused on my recovery, and I will continue to follow everything the doctors tell me. They're seeing good progress in my test results, and I'm feeling that progress physically. I plan to be healthy and ready to compete at Daytona in February. I'm working toward that."

Dale Earnhardt Jr. won't race again this year. USATSI

Hendricks Motorsports brought Jeff Gordon out of retirement to run a couple of races while Eardhardt Jr. recovered.

He and Alex Bowman will continue to fill in for No. 88 for the final 12 races of the season. Gordon is set to drive on Sunday in Darlington.

"I know how hard Dale has worked and how frustrating this is for him," said Rick Hendrick, owner of Hendrick Motorsports. "He wants to be back, and we want him back, but we want it to be for the long haul. We've had incredible support from everyone involved with the team, including all of our sponsors. They've put Dale's health first every step of the way."

Here's how the final race schedule will break down.