The Oakland Athletics activated second baseman Mark Ellis from the 15-day disabled list and sent first baseman Daric Barton to Triple-A Sacramento on Wednesday.
Ellis has been sidelined since June 7 because of a hamstring strain. He is batting .211 with one homer and 15 RBIs.
Rookie second baseman Jemile Weeks has assumed the starting role and will remain in the lineup. A's manager Bob Melvin said Ellis would see time at second, third and first base in order to get more playing time.
Barton was batting just .212 with 21 RBIs while committing eight errors, the most among all first baseman.
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