Don Drysdale

Topsoil is a place of digestion. It sucks and chews things into smaller pieces. When it's hungry, it turns grey and stony; when it's thirsty, it opens thousands of cracked lips. Subsoil is more skeletal: it doesn't digest.

Baseball calls it a curve ball for a reason: you just don't know where some pitches will land. Your ace could get injured. Your golden glover could err. Your team could sit through a rain delay. Your manager could get ejected. Your bench must be broad and deep enough to overcome.