Anyone who knows baseball knows that the Padres are the definition of a small-market team. Small market teams bring up young prospects or buy veterans on the cheap, let them succeed, then trade them away when their stock is highest, or when they have to be moved because of either decline or an expiring contract (i.e. Adrian Gonzalez, Jake Peavy, Mike Adams).
One thing the former management team of the Padres were able to do was to get value from trades, most notably trading Billy Killian, Akinori Otsuka and Adam Eaton.
Billy Killian never played in the majors, Akinori Otsuka appeared in less than 70 games in his career in Texas and has not pitched in the Majors since 2007, and Adam Eaton finished with a career 6.40 ERA after leaving San Diego.
There is no need to explain what Chris Young (who had a 3.60 ERA in 6 seasons with the Padres while winning 33 games) and especially Adrian Gonzalez (who in 5 seasons hit .288 and had 501 RBI) meant to the organization.
All of these players are 25 or younger, and all have major league experience, except for two. One of whom just got called up.