In baseball, the term “one pitch pitcher” refers to a pitcher who is overly reliant on one type of pitch (fastball, curveball, etc.) to be effective. History tells us this approach has limitations and ultimately limited success. They lack the versatility in their repertoire of pitches to solve the many different kinds of situations they face in the course of a game. Experts will tell you that the best pitchers have 3-4 different pitches they can throw at any given time and at any velocity they choose to solve the predicament in front of them.