During a doubles tennis match, Rick O’Keefe hit a hard serve and returned the ball powerfully when his “collarbone snapped.” “I was playing with three other guys and one of them was a doctor and he’s ...

Your clavicle, or collarbone, is the long, thin bone that connects your chest to your shoulder. You have one on each side of your body. These bones help hold up your shoulders and allow you to move ...