Dale Earnhardt Jr.'s landmark moment

After weeks of recurring headaches, Dale Earnhardt Jr. decided to seek medical help, which led to a doctor diagnosing him with a concussion.

Marty Smith views it as an important moment in sports history:

Few human qualities are as dynamic as vulnerability. Those self-confident enough to acknowledge the deepest part of their personal weaknesses are in fact the strongest among us. Just are. They’re on another level spiritually. It takes indescribable guts to peer into your soul that deeply, because you may not like what you learn.

He’s right.