Interesting thread. A few thoughts: Don't you need to have a baseline of some sort with each guy - like mentioning or accounting for what the average k/9 for each guy would have been? Along the lines of what Brock kind of touched on - some of those older guys...the game was different back then. One other thing that immediately jumped out at me was, what are the ground ball %'s for all these guys? To further that statement, you can be a really good pitcher that conserves your pitches, gets weakly hit balls for outs, saves pitches, and go deeper into games. Maybe you don't pitch for strikeouts to allow you to go deeper in games, but when you need a K you can get one. Halladay especially always seemed like a really good example of that.