The Royals have invited a number of their top prospects to participate in spring training next month. A total of 23 non-roster invitations to big league camp have been extended by the club, with six of those going to players ranked by Baseball America among the organization's Top 10 prospects. Those six are first baseman Eric Hosmer, who was ranked as the Royals' No. 1 prospect by the publication, third baseman Mike Moustakas (No. 3), and left-handers John Lamb (No. 4), Mike Montgomery (No. 5), Danny Duffy (No. 7) and Chris Dwyer (No. 8). Right-hander Aaron Crow, who was ranked ninth, is on the 40-man roster and will be in camp as well.