Kansas City Royals pitcher Danny Duffy.
Kansas City Royals pitcher Danny Duffy. John Sleezer jsleezer@kcstar.com
Kansas City Royals pitcher Danny Duffy. John Sleezer jsleezer@kcstar.com

How Danny Duffy stopped worrying and learned to love his fastball in the bullpen

April 26, 2016 01:51 PM