Earlier today I noted the falloff in offense. I've been wondering if age has anything to do with it. In 2005, batting age was at the highest level since World War II. After a couple of years going down, it's jumped again. Age is measured as average age per plate appearance. So it matters who you play, not who is on the roster (click on the chart for a larger image).

The average batting age in 2007 is 29.6 years. So the average hitter is playing past his peak. It may not be a huge factor, but it's something else to consider when evaluating what's going on.