If you're looking for anime similar to Yakyuubu Aruaru, you might like these titles.
Katsumi has been playing baseball (disguising herself as a boy for years), but one day she is recognized and scouted by an old family friend. Unfortunately, she ends up playing against the team that's coached by her own father. After she befriends her team's new catcher Oikawa, Katsumi's skills win over one suspicious mind after another.
The official music video for ReadyMade, by Ado.