Coaches count pitches. Particularly early in the season. Do not overwork young arms. Get into the practice of splitting games with your pitchers. Their arms are not ready for heavy workloads.
Arms stay fresh.
Pitchers can come back later in the week and they will thrive on the regular work rather than appearing just once a week. This requires coaches to pay less attention to the scoreboard, but it will help to develop and preserve pitchers. As the weather gets warmer and the pitchers stronger, you can then stretch the innings out. Remember, count pitches not innings. There you have it.