2 0 0 7 ▁season , ▁but ▁he ▁jump ed ▁right ▁into ▁Single - A ▁in ▁ 2 0 0 8 ▁and ▁held ▁his ▁own ▁as ▁a ▁ 1 9 - year - old , ▁pitch ing ▁for ▁the ▁South ▁B end ▁Silver ▁Haw ks . ▁He ▁had ▁a ▁ 1 2 – 5 ▁record ▁with ▁a ▁ 3 . 4 4 ▁E RA , ▁f anning ▁ 1 7 7 ▁in ▁ 1 1 7 ▁inn ings . ▁After ▁starting ▁ 2 0 0 9 ▁at ▁high - A ▁Vis alia , ▁he ▁was ▁promoted ▁in ▁April ▁to ▁the ▁Diam ond back s ▁Double - A ▁affili ate , ▁the ▁Mobile ▁Bay B ears . ▁During ▁a ▁start ▁on ▁July ▁ 3 0 , ▁Parker ▁injured ▁his ▁right ▁el bow . ▁He ▁did ▁not ▁pitch ▁again ▁that ▁season ▁and ▁ended ▁up ▁requiring ▁Tommy ▁John ▁surg ery , ▁which ▁took ▁place ▁on ▁October ▁ 2 8 , ▁ 2 0 0 9 ▁and ▁thus ▁and ▁missed ▁the ▁entire ▁ 2 0 1 0 ▁season . ▁ ▁He ▁spent ▁the ▁ 2 0 1 1 ▁season ▁with ▁the ▁Mobile ▁Bay B ears ▁in ▁the ▁Southern ▁League , ▁with ▁an ▁ 1 1 – 8 ▁record . ▁He ▁made ▁his ▁ML B ▁debut ▁on ▁ 2 7 ▁September ▁ 2 0 1 1 , ▁against ▁the ▁D od gers . ▁He ▁pitch ed ▁five - plus ▁inn ings ▁of ▁shut out ▁ball . ▁ ▁Oak land ▁Athletics ▁On ▁December ▁ 9 , ▁ 2 0