Royals | Kelvin Herrera working on curve
Fri, 01 Mar 2013 16:56:14 -0800
Kansas City Royals RP Kelvin Herrera is making it a point to improve his curveball this spring. "I want to be able to mix that in more with my other pitches," he said. "I want to throw it more often. I want to gain enough confidence in my breaking ball to do that. I've been throwing it a lot (in practice), and I feel good about it."