The Royals optioned Black to Triple-A Omaha on Tuesday.
Black joined the Royals in a trade with San Francisco in November. He entered camp slated for a relief role and put up good numbers during Grapefruit League play, pitching eight scoreless innings with an 8:3 K:BB over six appearances. Though he'll begin the campaign in the minors, it seems likely that Black will be up with the big club at some point during the season.