Collateral Damage: Hasta Luego, Albert Pujols

When a wrist is forced into hyperextension as Pujols’ was, it moves into what is called the “closed pack position” of the radiocarpal (radius and wrist bones) joint. The closed pack position is the position of the joint in which the bones have the maximum amount of contact with each other, and therefore the most bony stability.

Baseball Prospectus