@hannawantstoread haven't seen these two mentioned. Haven't read them but the sequel just popped up on another site. https://mangadex.org/title/1737/diamond-no-ace and https://mangadex.org/title/16168/diamond-no-ace-act-ii
Both have 200+ issues and are rated in the upper 8's.
You would have to work your way through the list yourself here, but you can see the descriptions, year and rating,
https://www.mangaupdates.com/series.html?page=1&perpage=100&category=Baseball 600+
or if you want to narrow it you can use their advanced search page
https://www.mangaupdates.com/series.html?act=genresearch
then you can restrict the search to things you want or don't want although I wouldn't get to restrictive. But if you wanted to get rid of Sci-fi and josei just check the exclude option. In the categories box enter something like below
Baseball
-Magic Item/s
The Baseball returns manga/novels with the category Baseball, the - Magic Item/s gets rid of stories with the tag Magic Items. There was at least one story that had a magic bat. Note if you get nothing it is often do to a misspeeling in one of the categories that are an include. You can build the list although you may lose some good books if you get too specific.
