As the La Plata baseball team’s bus made its way toward Harwood, Md., on Saturday afternoon, senior Alex Calvert spent his time getting in the proper frame of mind. Calvert knew what the fourth-ranked Warriors were up against. Tenth-ranked Arundel was the only unbeaten team remaining in Anne Arundel County, and it would already have played one game at the four-team tournament at Southern High by the time La Plata arrived.