If by "a run" you mean sprints, then I'd agree. If you mean a jog for longer distances, then I'd say you're doing something that pitchers don't necessarily need the day after. Pitching's not an aerobic activity, it's anaerobic, alactic. Although long distance running may be good for overall endurance, it shouldn't be thought of as a way to get rid of lactic acid after a game.
Just be clear on why you're doing it.