As he sprinted to chase down a Bryce Harper pop-up in foul territory two and a half years ago, Mac Williamson lost track of where he was on the field.
The San Francisco Giants outfielder tripped over the bullpen mound beyond the left-field foul line at Oracle Park and careened head first into the padded wall separating the field from the seats.
The severe concussion that Williamson suffered in the collision sidelined him for the next month and proved to be the turning point of his career. When he returned, the former third-round draft pick struggled at the plate and never reproduced the home run pop he had flashed prior to the injury.