Comparing Ranges of K% and BB%

Recently, I’ve begun comparing pitchers based on their K% and BB% going back to 2002, which is when batted ball data begins to become available on FanGraphs. My thought is this: pitchers have pretty good control over their K% and BB%, so those reflect true skill. What I want to see is a range of effectiveness for pitchers in the MLB within a set range of K% and BB% to compare players. I recently looked into John Lamb, who is a pitching prospect in the Royals minor league system. What follows is not a rigorous analysis but just something interesting I observed. 

Starting Pitching Review

GMDM and Yost declared before the 2013 season began that they wanted and would get 1000 IP from their starters. I laughed; an absurd claim, I thought. By the end of the season, the starters threw 986.2 innings, good for 4th of 30 teams. Pretty close; I was happy. The starters had done their jobs in 2013. This was in stark contrast to 2012, when the starters pitched 890 innings, good for 28th of 30. What worked, and what didn’t?