Chapter 299 opens with a discussion of the pros and cons of using different grips to improve a pitcher's mechanics. The pros argue that it's better to have a variety of pitches to throw than to have one pitch that's too hard for a pitcher to throw. The cons argue that using a different grip will make it more difficult for the pitcher to get the strike outs he needs. They're also worried that the other team's fourth batter will be able to read their different pitches better than they can.