These are the 10 best farm systems in baseball

Ranking MLB's top farm systems When A.J. Preller took over as Padres general manager in August 2014, he hoped to return the club to contention instantly. In his first four months on the job, he traded a slew of prospects -- including Jake Bauers, Zach Eflin, Max Fried, Joe Ross, Mallex Smith and Trea Turner -- and young big leaguers for veterans who could provide immediate help.

That plan didn't work as hoped, so Preller did a 180 after San Diego went 74-88 in his first full season at the helm. On consecutive days in November 2015, he dealt Joaquin Benoit to the Mariners for two prospects (most notably, Enyel de los Santos) and Craig Kimbrel to the Red Sox for four more (including Manuel…