It 's also possible that the A 's would entertain offers for Marcus Semien with top prospect Franklin Barreto closing in on the majors .
Marcus Semien hit 27 homers in 2016 and is n't eligible for free agency until after the 2020 season .
It 's also possible that the A 's would entertain offers for Marcus Semien , who hit 27 homers in 2016 and is n't eligible for free agency until after the 2020 season , with top prospect Franklin Barreto closing in on the majors .