[Stardust]

^ Probably the best argument yet is exactly what you said. There would not likely be a single player responsible as much as a pitcher. And then there are the times that the players around the pitcher do not do their job. How often do pitchers lose games because they get no offense around them, poor defensive execution, or blown saves? Pitcher bares more brunt than any single player on the roster and he can only do his job once every four games, which is an indication that the rest of the players do not have to play as hard as he does.