The Cardinals hold the three-week camp as a way to provide more individualized instruction to those players. It was in instructional league two years ago, for instance, that St. Louis began converting No. 18 prospect Carson Kelly to a catcher. Kelly has been invited back this month, as have Top 30 prospects Magneuris Sierra (No. 4), Edmundo Sosa (No. 5), Ronnie Williams (No. 13), Austin Gomber (No. 21), Oscar Mercado (No. 26) and Sandy Alcantara (No. 29).
The Cardinals' instructional league, which runs through Oct. 7, will also feature several games against the Mets' and Marlins' respective programs.