Bakkure Ippei!

The Giants, stuck at the bottom of the standings for two consecutive years, suddenly has an extraordinary free agent join their ranks. His name is Ippei Sawamura. His personal life is a mess, but his pitching talent is Major League caliber. Will Ippei be the savior of the Giants, whose pitching staff has been decimated? Three of his high school teammates also join the team, as the revival of the prestigious Giants is entrusted to Ippei's right arm.

(Source: eBookjapan.yahoo.co.jp, translated)