MLB run scoring is down. A lot:
There are many causes of decreased run scoring. Jeff Zimmernan at The Hardball Times thinks that one solution is to expand the number of MLB teams:
Why should there be expansion? One reason is the run scoring environment. Run production has dropped from from a steroid-era high of 5.1 runs per game per team in 2000 to 4.1 last season. Pitching is now the dominant force in the game. The last four times the majors expanded, runs increased as the pitching talent was spread thinner. Looking at the two seasons before an expansion of teams and the two seasons after, the average increase in runs scored per game was a third of a run. Without expansion and if things remain static, scoring will likely go even lower as pitching talent becomes more and more concentrated.
This is an interesting, testable hypothesis: when there is a more concentrated talent pool of potential MLB players, run scoring decreases.…