There's a newly launched baseball-themed game on Heyuri★CGI! It's called Gekikuukan Powerful League 2 (Gekipawa), and you can play it here: https://cgi.heyuri.net/gekipawa2/

The gameplay is similar to Battle Royale-R - first make a team, then compete against other players' teams, and see if u can come out on top at the end of teh season

This is one of the classic CGI games, being first released in 2001, and it still has people on teh Japanese web playing it today. It's a fairly simple game at its core, but I've added quite a few mods & enhancements that were popular back in teh day (plus a few of my own)

Play ball!!