Tatsuo Shinada used to play for Nagoya’s Wyverns, but is banned from baseball after he started gambling. You can help him regain his honor in Yakuza 5.
In Shinada’s "another drama" he meets up with his former teammate Shirakawa who was a pitcher. Shinada runs into his high school coach too who offers guidance when other people challenge you.
Yakuza 5’s baseball mini-game has players move a cursor to aim before they take a swing. You can practice in batting cages before stepping onto a baseball field for the game.