Kiley McDaniel of Fangraphs rated Whitley as the draft 's No. 15 prospect .
Whitley placed 17th on the Top 20 of MLB. com 's Jonathan Mayo and Jim Callis .
Kiley McDaniel of Fangraphs rated Whitley as the draft 's No. 15 prospect , and he placed 17th on the Top 20 of MLB. com 's Jonathan Mayo and Jim Callis .