"Protection is overrated. There's no evidence that having a superior batter behind another batter provides the initial batter with better pitches to hit; if it does, those batters see no improvement in performance as a result. Additionally, it's very rare that a situation arises in which run expectation drops after the pitching team walks the batter at the plate. Therefore, if the pitching team does walk a batter because it would rather pitch to the following man, it is almost always making a mistake by opening the door for a big inning. The situation changes late in close games as the importance of a single run begins to trump that of many runs, but even in those situations, the difference between the two batters would have to be extreme."