Though called "Pro Debut", the players are not making their "pro debut." Many have two, three, sometimes even four years of professional experience. In fact, some of the players are in the set for a second time. This product is a real head scratcher for me.
Since the Cubs are in a rebuilding mode, they netted ten slots in the set. Personally, I'd rather have a good team with lots of cards in the base set instead of ten cards in a prospect set. But that's not where they are right now. Some day soon I hope, but not right now.
Six players are shown as Boise Hawks, the Cubs short-season rookie league team.
Three more are with the Daytona Cubs, the Cubs High-A team.