Cardinals president of baseball operations John Mozeliak said Tuesday that King will be optioned to Triple-A Memphis, John Denton of MLB.com reports.
King was scheduled to face hitters Sunday at the Cardinals' spring training complex but was unable to due to illness, and the left-hander did not travel with the team to Arizona for its two exhibition games against the Cubs on Monday and Tuesday. The 29-year-old struggled early in spring training, but he allowed no runs in his final three Grapefruit League outings before the illness surfaced. With King heading to the minors, Ryan Fernandez will nab the final bullpen spot on the Opening Day roster.