Adam Brashear is a former fullback at Cornell University as well as a veteran of the Korean War, a member of the Marine Corps with two Silver Stars. While in the Marine Corps he met Conner Sims, the friend he would later know as Anti-Man. Brashear later became the project lead on a scientific attempt to harness anti-matter through the creation of a Negative Reactor which created a bridge between the Negative Zone and the positive matter universe. This reactor would be a source of unlimited clean energy by allowing devices to tap the stable event horizon balanced between the two universes. Due to the unexpected explosion of the reactor, both Brashear and Sims were subjected to mutagenic radiation generated by the destabilized event horizon. While Sims' body dissolved into energy, Brashear became a stable "antimatter reactor" with superhuman abilities, which he used to fight crime under the superhero alias Blue Marvel.
