Lucas Carr was a resident of Happy Harbor when Starro came to Earth-One to begin his invasion of humanity. Thanks to the lad's accidental discovery of the alien's weakness, lime, the Justice League of America defeated the villain and made Carr an honorary member. He was given a flying hot rod designed by the League, and over the years Snapper proved valuable more than once in assisting his teammates.
Sylvester Pemberton was the child heir to his father's fortune when he became inspired to adopt a stellar uniform and alter ego. When he was joined by his future chauffeur Pat Dugan, the pair became the dynamic duo known as Star-Spangled Kid and Stripesy. Dugan designed for them their flying car, the Star Rocket Racer. Soon after, they were both charter members of the Seven Soldiers of Victory.
Snapper fell into some bad association, first duped by a disguised Joker into revealing the JLA's cave headquarters and later assisting the Key in developing the villain Star-Tsar, Using stellar based technology, Snapper as Star-Tsar was a recurring adversary of the League, although his ultimate intention was to supplant the schemes of Key and another rogue named Mark Shaw, which with the League he was able to accomplish. Snapper eventually reconciled with the team once more.
Star-Spangled Kid was eventually liberated with fellow Soldiers from ancient eras they had been exiled, returning to the 20th century where he was given Starman's Cosmic Rod to embark on a new career, joining the Justice Society of America. He created a Cosmic Converter Belt that gave him star-based powers similar to technology created by Earth-One's Evil Star. Syl eventually created a new persona as Skyman with his new team, Infinity Inc. which operated out of Stellar Studios, once owned by Guy Pompton aka Earth-Two's Evil-Star.