Rich Lederer ranks pitchers by strikeouts per 100 pitches, which he feels is a better measure of pitching ability than K per 9.

The link comes via River Ave. Blues who notes:

Three Yankees finished in the top six, as Joba came in third (6.90), CC Sabathia fourth (6.58) and AJ Burnett sixth (6.33).

This is why I like those two signings. They move the Yankees back to their successful days of the late 1990s and early aughties when the staff struck out batters from top to bottom. With a poor defense behind them, a high strikeout staff covers that weakness, allowing for the strong offense to dominate.