Who are the 12 prospects the Padres dealt?

As A.J. Preller has worked tirelessly to remake the San Diego Padres’ big league roster, he has not been afraid to send prospects or young players away to get the Major League pieces he desires. Once the Justin Upton trade becomes official, a total of 12 players who appeared on the Padres’ Top 20 list at some point in 2014 will have been dealt.