Dale Earnhardt Jr. announced on Tuesday that he will retire from NASCAR racing at the end of the 2017 season. The two-time Daytona 500 winner has spent 18 seasons racing in the top NASCAR series, racking up 26 wins along the way. SI looks back at some of Junior's best photos.
Over Dale Earnhardt Jr.'s prolific NASCAR career, he's stated that he's accumulated at least 12 concussions. SI Now host Amy Campbell asks the legendary driver why so many athletes refuse to speak up about their issues with head trauma.