Dan Gable endured a rough upbringing, personal tragedy and athletic defeat at the highest level.  But he never stopped, becoming the greatest American wrestler to ever compete.

Sources

A Wrestling Life by Dan Gable with Scott Schulte

The Champion Dan Gable from The US Olympic Museum website

Dan Gable Dominated as Wrestler and Coach by Douglass Looney, ESPN website

The Losses of Dan Gable by Wright Thompson, ESPN website