The Padres general manager A.J. Preller has a history of trading top prospects to solidify his team's lineup. This week he sent three youngsters to the White Sox in exchange for starter Dylan Cease, a move that marks his track record of making big deals. Preller's relentless work ethic and sharp eye for talent have made him a compelling executive in the world of baseball. Let's examine his history of trading high-ranking prospects and the impact it has had on the Padres organization.