Leather Boy, a miscreant who misread Mister Immortal's personal ad seeking men and women of action, joined the Great Lakes Avengers for an extremely brief period of time. As Mister Immortal said, "The less said about it, the better." Unfortunately, he later returned clad in the leather variation of Doctor Doom's armor, wanting revenge for being left out of the second recruiting drive, and murdered Monkey Joe. Big Bertha, however, caught and defeated Leather Boy by sitting on him.