Daiya no A

Synopsis

From Viz:
Eijun Sawamura had his heart set on the middle-school national baseball championships. But his team is eliminated thanks to a wild pitch thrown by Eijun himself. He's planning to go to high school with his teammates and try again next year when he's scouted by the famous Seido High School Baseball team. When he goes for a campus visit, he finds himself on the receiving end of a baptism by fire! His experience forming a battery with up-and-coming catcher Miyuki rekindles his passion for baseball

Official English: INKR Comics, Azuki

Note: Won the 53rd Annual Shogakukan Manga Award in 2007 and the 34th Annual Kodansha Manga Award in 2010 in the Shounen category.

Synopsis & details from MangaUpdates