Kubel's RBI single giving Arizona a 4-2 lead in the fifth inning proved to be the decisive hit, while Hill supplied a two-run single in the first as Arizona completed a three-game sweep of the Athletics.
Saunders (4-4) limited the A's to one earned run on seven hits in his six-inning effort.
Oakland starter Travis Blackley (0-2) was touched for four runs (three earned) on six hits over 4 2/3 innings.
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