AUSTIN—Despite being the fourth seed—based on overall record—in the Class 3A state baseball tournament, Pleasant Grove comes into today’s semifinal game against top-ranked Castroville Medina Valley with a lot of confidence.

The Hawks haven’t lost a game in the playoffs, electing to play just one game—as opposed to a best-of-three series—in the last three rounds, and have dropped only one game to a 3A team all season.

PG lost an 8-1 decision to Pittsburg in its regular season finale. The Hawks beat the Pirates, 7-1, last week in the regional finals, and head coach Craig ...