The Seattle Mariners Farm System Rankings Won’t Matter … At All The Mariners' rebuild depends on a lot of things. Farm system rankings are not one of them. 2018-12-17 By: Jason A. Churchill On: December 17, 2018 In: Seattle Mariners Everybody loves rankings. But the rankings of MLB farm systems mean zero. ‘But Churchill, you rank and grade pretty much everything.’ I know, I do.Go!