The Falcons released King on Tuesday, Terrin Waack of the Falcons' official site reports.
King worked with the second-team defense in multiple positions during training camp and made a splash during the preseason, but the Falcons kept only five cornerbacks on their initial 53-man roster. Falcons assistant defensive coach Jerry Gray was the secondary coach in Green Bay when King was at his peak, so despite getting cut, it's possible King's familiarity with the coaching staff helps him secure a practice squad deal if he doesn't get a contract elsewhere.