Dirt inside my left cleat from pitching?

Im a left hand pitcher and literally every time I pitch off the mound my left foot is covered with dirt. Today I pitched 4 innings and I now how a scratch on my foot. Is it my pitching mechanics? How can I change this?

tie your shoe tighter. Make sure the tongue of the shoe is flush again your leg. Sometimes this happens to me when I’m working on mechanics, but usually not in a game.

I don’t know of any mechanical adjustments that may help that. It may just mean that you’re dragging your back foot, which is not a bad thing.