The last 3 nights starting pitching efforts made me think about the young guys and development. From oldest to youngest here's a list of the younger pitchers, still in the system, from the majors to AA who were expected to eat a lot of innings, especially out of the rotation, and their ages.
David Martinez, AA, 8/4/87
Dallas Keuchel, MLB, 1/1/88
Brad Peacock, MLB, 2/2/88
Alex White, 60-day DL, 8/29/88
Wojo, AAA, 12/21/88
Bobby Doran, AAA, 3/21/89
Brett Oberholtzer, MLB, 7/1/89
Ross Seaton, AA, 9/18/89
Jake Buchanan, AAA, 9/24/89
David Rollins, AA, 12/21/89
Jarred Cosart, MLB, 5/25/90
Nick Tropeano, AA, 8/27/90
Jordan Lyles, MLB, 10/19/90
Ruben Alaniz, AA, 6/14/91
Folty, AA, 10/7/91
I did not include Cisnero and Clemens because of their major league use. If they're included Cisnero is in the middle and Clemens is closer to the top of this list.