Saikyō! Toritsu Aoizaka Kōkō Yakyūbu

Strongest! Aoizaka Metropolitan High School Baseball Club (最強!都立あおい坂高校野球部) is a shōnen manga by Motoyuki Tanaka. The manga began its serialization in Shōnen Sunday from 2005 vol. 6 and ended in 2010 vol. 20. In 2008 the series won the Kodansha Manga Award in the shōnen category.

Plot
Six years ago following a crushing defeat, a group of friends promise that they will one day take their friend Suzuo to the Koshien. Now in their first year of high school, the friends have reunited behind the pitcher Kitarō Kitaōji to keep their promise. With Suzuo as their manager and Kitarō's signature left-handed, underhand "Submarine Pitch", they may just go all the way.