Koukou Kyuuji Zawa-San

It’s about a girl, often called as Zawa (short for her surname, Miyakozawa), in a high-school baseball team. She’s talented, but being a girl, she doesn’t get to participate in any official matches, and yet she trains just as hard as the rest of the team anyway, just for her own personal satisfaction.
Nominated for the 3rd Manga Taisho Award (2010).