If you're looking for anime similar to Yakyuukyou no Uta: Heisei-hen, you might like these titles.
Kurata from Bijyou feels guilty about beating the crap out of other players. Abe’s accidental injury strikes a chord, and he no longer wants to be involved with Roka’s dirty schemes.
Second season of Gurazeni: Money Pitch.
Bonda Natsunosuke (26, single), is a left-handed relief pitcher for the professional baseball team, the Jingu Spiders. He became a pro right after high school and now in his 8th year makes 18 million yen a year, and is not what you'd call a "first rate player." "I don't know how many years I've got left to play after 30." "Only a few can become coaches or commentators after they retire." "Pro baseball players need to make their money while before they retire!" Despite the harsh realities, Bonda always repeats the same phrase: "There's money buried in the grounds."