But Burton's effectiveness is in dispute, in 2009, 2010 and 2011. It helps to add the full context to the numbers you cite. His velocity was at the lowest of his career in all three seasons. And- his velocity actually dropped 2.2 MPH from 2007 to 2009 (93.2 vs. 91.0), what you failed to mention, Burton pitched hurt most of 2009 and made multiple trips to the DL- and he ended up with the worst year of his career to that point in time. And you're comparing a lousy year in 2009 when he was pitching hurt, with a lousy year in 2014 when he's supposedly healthy. And he was hurt for all but but 3 innings in 2010 and 4 innings in 2011- his velo was at the low point of his career, but I'm not sure why would you even use those years as examples of anything. He regained his full health in his first year with the Twins in 2012 at age 30/31 ...and his velocity returned to at, or near, career-bests in 3 pitches (92.6 on his 4-seam FB, and career highs in velocity on his 2-seam FB- 93.0 and also on his CB- 92.9) His velocity dropped in 2013 at age 31/32, and his hit-ability and wildness increased. His velocity further dropped in 2014 at age 32/33- to levels similar to his previous- mentioned lousy, but unhealthy year of 2009, and his strikeouts have also dropped, along with increased hit-ability and wildness. These numbers confirm the trends cited for all pitchers in the aggregate.