Atom Smasher

A former gladitorial champion on War World, Atom Smasher was an original founding member of the Justice League, but has since parted ways with the team.

History
Atom Smasher first appeared on War World as Monguls reigning gladiator champion. He ended up helping Superman and the other heroes fight Mongul's forces and escape from War World, and upon returning to Earth he helped them form the Justice League.

When Cyborg Superman's group of villains he secretly hired attacked the Justice League, Atom Smasher was among the members who was taken out of action, apparently dying from a venomous bite from Copperhead. However, it turned out that Atom Smasher had survived because the Aztec supervillain El Dorado rescued him. El Dorado then used his mental abilities to mind control Atom Smasher, using him to help in his search for the city of El Dorado. The Justice League was able to defeat El Dorado after they uncovered his plan, thus terminating the mental control Atom Smasher was under. He then became an active League member again.

Shortly after reuniting with the League, Atom Smasher fought the man known as the Rocketeer, who had tried to join the Justice League but upon rejection turned to criminal and terrorist acts. Atom Smasher managed to find him in a forested area and defeated him in one-on-one combat.

When the Seven Deadly Sins manipulated various Justice League members, Atom Smasher was stricken with the Sin of Greed. During this arc, he actually discovered that Batman's identity was Bruce Wayne and looted his mansion. He has since kept his knowledge of Batman's identity a secret between him and Batman.

After Superman was kicked off the Justice League for disobeying a League decision to not interfere with Mongul's hegemony on War World, Atom Smasher also left the League, citing his reason as being that he just could no longer stand the several egotists on the team and what he felt was a lack of a true team atmosphere.