Delroy Garrett Jr. (Earth-1955)

"It felt good to get in a scrap like that again. Even if I wasn't needed. ... Like being in the Justice League -- It's hard to pull my weight with them."

- - 3D-Man

Delroy Garrett Jr. is a failed athlete who resorted to experimental forms of increasing his durability and resistance to compete, which resulted on him gaining superpowers. Chosing to use them to better himself, he became 3D-Man.