Doing so provides a smoother, more playable field surface than if the field was left dry. On one particular hot, dry summer day, my team and I were taking infield. read more
As an aside, groundskeepers have been known to make the infields particularly wet when the opposing team has a strong run game. Doing so slows down runners on the basepaths. Obviously that affects both teams, but it hurts the team that likes to steal more. read more