The eldest Jordan brother, Jack has been voted the D.A. for Coast City, a position that has made him a target for criminals. He would be saved countless times by the Green Lantern who is secretly his younger brother Hal Jordan.

The modern era would establish that prior to his death, Jack was on bad terms with Hal, due to Hal breaking the promise to their mother not to follow in their father's footsteps. After their mother died, Jack never forgave Hal, blaming that his recklessness had shortened their mother's life causing her to die out quickly.

  • Although this character was originally introduced during DC's Earth-One era of publication, their existence following the events of the 1985–86 limited series Crisis on Infinite Earths remains intact. However, some elements of the character's Pre-Crisis history may have been altered or removed for Post-Crisis New Earth continuity, and should be considered apocryphal.