Interesting post on the quality of pitches, however it is difficult to understand from a normal readers view. How does FIP or SIERA measure to determine an effective pitcher? I understand ERA is earned runs per 9 innings. How does a pitcher with a 2.00, 3.00, 4.00, 5.00 ERA fall into the QOP Scale if between 4-5 QOP rating is the average? I do not believe your line graph makes a whole lot of sense to me. According to the graph, as the “ERA/FIP/SIERA” increases (vertical y axis), the QOP Pitcher Effect (horizontal x axis) decrease by -0.5? So, if I am looking for the median of 5 QOP, which is the 0.0 x axis, the pitcher has an average ERA of approximately 4.75, FIP of 4.5, and a SIERA of 4.25? This line graph is difficult to understand. In my mind, a pitcher with an ERA of 4.75 would have a much lower QOP. I believe if you made the x axis scaling between 1-10 (and correlate to the QOP Scale that has QOP buckets of 0-2, 2-4, 4-5, 5-6, 6-8, and 8+), then this would give the reader a better understanding of how ERA/FIP/SIERA is truly affected by QOP. The line graph however depicts a different message to me, and is not easy to interpret for the average “layman non-statistics major” like myself. There is good information here, however I believe the message was not delivered clear enough of how having a QOP in the various buckets relates to a pitcher in the average bucket. 1. Where does the twins starting pitchers fall into each bucket on the QOP scale? 2. Where does the twins bullpen stand compared to a team with an elite bullpen (such as the Yankees or Dodgers)? 3. How does Ervin Santana (Near Elite) compare to Clayton Kershaw (Elite)? 4. What was Fernando Rodney’s QOP in his successful saved games versus his blown saves in 2017? 5. What about Matt Belize in 2017 (9 saves and 2 blown saves)? 6. Can this be translated to hitters as well? Such as, what was the QOP of the at bat that Joe Mauer hit a home run, versus the QOP of the AB's that Mauer slapped a single?