Part of the Flash's original Rogues Gallery, George "Digger" Harkness never achieved the success he though he deserved. He was eventually killed by Jack Drake after he was sent to assassinate him.

When the assassination went bad, and both ended up dead, Owen Mercer emerged. At first he joined the Rogues, but soon changed his ways.He was able to move past his feeling and help Robin with a case of his. He joined the Outsiders and became friends with Supergirl, but then left to be in the Suicide Squad, where he is currently. He left because of Batman's restructuring of the team.

Powers and Skills

Owen was trained in the use of boomerangs by his father before his death. Mercer also can create short busrts of superspeed, mostly when he throws his boomerangs. His speed comes from a meta-gene like Jay Garrick. He never showed any superspeed like the Flashs, but now that the Speed Force has come back he may be able to tap into it like other speedsters.

Weapons

Boomerangs: Uses trick boomerangs identical to those used by the first Captain Boomerang.

Electro-boomerang: Emit spark trails carrying a deadly 5,000 volts, which circle around the target.

Exploso-boomerang: Detonates on contact, damage to all in one area.

Gas boomerang: Monstrous intensity tear gas, affects one area.

Razor boomerang

Bladed boomerang

Acid-spewing boomerang

Sonic boomerang: Excellent intensity sonic attack.

Gravity boomerang: Creates local gravity field of Incredible intensity.

Weighted boomerangs: Solid-weighted boomerang.

Preprogrammed boomerangs: These boomerangs are rocket propelled and are preprogrammed to fly to a target, pick up whatever item and returned to a predesignated spot with amazing flight speed and range.