uma ▁Bull f ro gs ▁from ▁ 2 0 0 0 - 2 0 0 1 . ▁In ▁ 2 0 0 2 , ▁he ▁joined ▁the ▁Arizona ▁Diam ond back s ' ▁minor - le ague ▁system , ▁eventually ▁working ▁his ▁way ▁up ▁to ▁their ▁Tri ple - A ▁affili ate , ▁the ▁T uc son ▁Side wind ers , ▁which ▁he ▁managed ▁in ▁ 2 0 0 7 - 2 0 0 8 . ▁Pl um mer ▁managed ▁the ▁Tig res ▁de ▁Arag ua ▁for ▁the ▁ 2 0 0 1 - 0 2 ▁season . ▁Pl um mer ▁served ▁as ▁the ▁minor ▁league ▁catch ing ▁coordin ator ▁for ▁the ▁Diam ond back s ▁from ▁ 2 0 0 9 ▁to ▁ 2 0 1 2 . ▁He ▁managed ▁the ▁Nar an jer os ▁de ▁Herm os illo ▁of ▁the ▁Mexican ▁Pacific ▁League ▁for ▁parts ▁of ▁the ▁ 2 0 1 1 - 1 2 ▁and ▁ 2 0 1 2 - 1 3 ▁seasons , ▁taking ▁them ▁to ▁the ▁play offs ▁in ▁ 2 0 1 1 - 1 2 . ▁Pl um mer ▁managed ▁the ▁Le ones ▁del ▁Car ac as ▁to ▁a ▁Venez uel an ▁Winter ▁League ▁championship ▁in ▁ 1 9 8 6 - 8 7 . ▁He ▁also ▁managed ▁Car ac as ▁for ▁the ▁ 1 9 8 8 - 8 9 ▁season . ▁ ▁In ▁ 2 0 1 3 , ▁he ▁served ▁as ▁manager ▁of ▁the ▁Diam ond back s ' ▁Single - A