J.J Cooper from Baseball America posted the lists of the ten youngest players in each league and four players in the Pittsburgh Pirates minor league system made the top ten in their league.
Gregory Polanco is the sixth youngest in the International League.
Alen Hanson ranks ninth in the Eastern League.
Jin-De Jhang ranks tenth in the Florida State League.
You won't see Reese McGuire on the list(unless it gets updated), but he is tied for the tenth youngest player in the South Atlantic League. He was born on the same day as Miguel Andujar, who is list tenth on the list. Cooper obviously inadvertently left McGuire off the list.
A couple notes on the list. It doesn't include players on the disabled list. That means that Jameson Taillon, Tyler Glasnow and Austin Meadows didn't make the list.
If you want to include them, Taillon would have ranked fifth in the IL. Glasnow would have came in eighth place and Meadows would be ninth.
John was born in Kearny, NJ, hometown of the 2B for the Pirates 1909 World Championship team, Dots Miller. In fact they have some of the same relatives in common, so it was only natural for him to become a lifelong Pirates fan. Before joining Pirates Prospects in July 2010, John had written numerous articles on the history of baseball while also releasing his own book and co-authoring another on the history of the game. He writes a weekly article on Pirates history for the site, has already interviewed many of the current minor leaguers with many more on the way and follows the foreign minor league teams very closely for the site. John also provides in person game reports of the West Virginia Power and Altoona Curve.