The redskin peanut or "runner peanut" found its way into the American diet after World War 2 and was the most popular snack food for many years. This is what's inside the "ballpark peanut", which is roasted in the shell and cracked open to nibble during a ball game. Redskin peanuts are bigger than their cousin, the Spanish peanut.
Check the nutritional benefits of peanuts here