How will closing impact Brett Myers’ fastball?

How Brett Myers will do as a closer and how valuable he is to the Astros in that role is not the question for this space. Just the fastballs.Let's take a look at some quick-and-dirty numbers (four- and two-seam fastballs all together; age determined by season year minus birth year—neither precise nor seasonal). If you go by the fastballs Myers threw as a closer in 2007, it seems starting impacted Myers more than expected, and now he's lost a wee bit more fastball than you'd expect, mostly with a big dip last year. There are no park or weather adjustments, so this is back-of-the-envelope quality. Let's take a look at some quick-and-dirty numbers (four- and two-seam fastballs all together; age determined by season year minus birth year—neither precise nor seasonal). If you go by the fastballs Myers threw as a closer in 2007, it seems starting impacted Myers more than expected, and now he's lost a wee bit more fastball than you'd expect, mostly with a big dip l...