af fer ▁attended ▁North ▁Har ford ▁High ▁School ▁in ▁P yles ville , ▁Maryland . ▁In ▁ 2 0 1 4 , ▁his ▁senior ▁year , ▁he ▁bo asted ▁an ▁ 8 - 2 ▁record ▁with ▁a ▁ 1 . 8 6 ▁E RA , ▁leading ▁North ▁Har ford ▁to ▁the ▁Class ▁ 3 A ▁state ▁championship . ▁Und raft ed ▁in ▁the ▁ 2 0 1 4 ▁Major ▁League ▁Baseball ▁draft , ▁he ▁en rolled ▁at ▁the ▁University ▁of ▁Maryland ▁where ▁he ▁played ▁college ▁baseball ▁for ▁the ▁Maryland ▁Ter rap ins . ▁ ▁In ▁ 2 0 1 5 , ▁as ▁a ▁fresh man ▁at ▁Maryland , ▁he ▁appeared ▁in ▁ 1 6 ▁games ▁( 1 1 ▁starts ), ▁going ▁ 5 - 1 ▁with ▁a ▁ 4 . 5 7 ▁E RA . ▁As ▁a ▁s oph om ore ▁in ▁ 2 0 1 6 , ▁Sh af fer ▁went ▁ 8 - 3 ▁with ▁ 2 . 6 0 ▁E RA ▁and ▁a ▁ 0 . 8 8 ▁WH IP ▁in ▁ 1 5 ▁starts , ▁ear ning ▁a ▁spot ▁on ▁the ▁All - Big ▁Ten ▁Third ▁Team . ▁In ▁ 2 0 1 7 , ▁as ▁a ▁junior , ▁he ▁compiled ▁a ▁ 7 - 3 ▁record ▁with ▁a ▁ 1 . 6 7 ▁E RA ▁over ▁ 1 4 ▁starts ▁and ▁was ▁named ▁the ▁Big ▁Ten ▁P itch er ▁of ▁the ▁Year . ▁ ▁After ▁his ▁junior ▁year , ▁he ▁was ▁draft ed ▁by ▁the ▁Arizona ▁Diam ond