Shortstop Corey Seager, baseball's top prospect, and left-hander Julio Urias, the game's second-best pitching prospect, give the Dodgers a fine head start. But they rank No. 1 on this list because their depth of talent runs so much deeper than it did a year ago. Thanks to breakout players (right-hander Jose De Leon, first baseman Cody Bellinger), fast-developing 2014 draftees (righty Grant Holmes, outfielder Alex Verdugo) and products of a nine-figure 2015 international spending spree (righty Yadier Alvarez, outfielders Yusniel Diaz and Starling Heredia), this system is loaded.