Yoenis Céspedes
Wells was traded to the Oakland Athletics on April 22, 2013, for cash. He was added to the 40-man and 25-man rosters when second baseman Scott Sizemore re-tore his ACL. Wells was designated for assignment on April 28 when Yoenis Céspedes returned from the disabled list. Wells had started a mere two games for the Athletics, one in left field and one as the designated hitter.