back s ▁in ▁the ▁sixth ▁round ▁of ▁the ▁ 2 0 1 7 ▁Major ▁League ▁Baseball ▁draft . ▁He ▁signed ▁and ▁made ▁his ▁professional ▁debut ▁with ▁the ▁Arizona ▁League ▁Diam ond back s ▁before ▁being ▁promoted ▁to ▁the ▁Hills bor o ▁H ops . ▁In ▁ 1 3 ▁games ▁( ten ▁starts ) ▁between ▁the ▁two ▁clubs , ▁he ▁compiled ▁a ▁ 3 . 3 8 ▁E RA . ▁He ▁began ▁ 2 0 1 8 ▁with ▁the ▁K ane ▁County ▁C oug ars . ▁ ▁On ▁July ▁ 2 5 , ▁ 2 0 1 8 , ▁Sh af fer ▁( al ong ▁with ▁Michael ▁Pérez ) ▁was ▁trad ed ▁to ▁the ▁T ampa ▁Bay ▁R ays ▁in ▁exchange ▁for ▁Matt ▁And ri ese . ▁He ▁was ▁assigned ▁to ▁the ▁Charlotte ▁Stone ▁C rab s . ▁In ▁ 2 6 ▁games ▁( 2 5 ▁starts ) ▁between ▁K ane ▁County ▁and ▁Charlotte , ▁he ▁pitch ed ▁to ▁a ▁ 9 - 7 ▁record , ▁a ▁ 2 . 7 9 ▁E RA , ▁and ▁a ▁ 1 . 1 1 ▁WH IP . ▁He ▁returned ▁to ▁Charlotte ▁to ▁begin ▁ 2 0 1 9 ▁before ▁being ▁promoted ▁to ▁the ▁Mont gom ery ▁Bis cu its ▁in ▁May . ▁Over ▁ 3 3 ▁appearances ▁( six ▁starts ) ▁between ▁the ▁two ▁clubs , ▁Sh af fer ▁compiled ▁a ▁ 4 - 3 ▁record ▁with ▁ 2 . 3 8 ▁E RA ▁over ▁ 1 0 2 ▁inn ings . ▁ ▁Carlos ▁V arg