Hendrick Motorsports announced on Friday that Dale Earnhardt Jr. will not participate in any more races this season.
Earnhardt is still recovering from a concussion he suffered earlier in the year. He has visited experts in his continuing rehab efforts, and has been advised that racing is not the best option for his health.
Replacing him in the No. 88 car for the remaining 12 races will continue to be Jeff Gordon and Alex Bowman.
"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."
Team owner Rick Hendrick: "Jeff and Alex will give us a great opportunity over the rest of the season.
"Jeff is one of the best of all time and knows our system. He brings things to the table that no one else can. Alex is a young driver with a lot of talent, and he will give us a fresh perspective. We know they're not only capable of running up front and giving us a chance to win, but they'll help us get better."