That chart actually shows a pretty nice correlation between HR/G and R/G, which should be expected. I'd love to see a plot of K/PA or K/9, vs size of strike zone, and vs average FB velocity. Here is the later from 2007 on http://i0.wp.com/www.mikereinold.com/wp-content/uploads/Average-MLB-Fastball-Velocity.jpg?resize=580%2C258 I'd say that it correlates pretty well with that K/PA curve. Would love to see a strike zone one too or even league % looking strikeouts over time, which would be a strike zone size indicator. The thing with strikeouts is that the pitcher is at least as responsible as the batter for one, and the strike zone and umpires and catchers framing have a role as well. If Sano strikes out 250 times, and hits 50 HR, I would have no problem, esp. since he is also projected to walk about 130some times (Twins' record 145 Killebrew; franchise record 151 Yost; will both have Sano's name at some point...)