History of On-Base Percentages since 1960

This is visualization of a historical view of baseball teams' On Base Percentages since 1960. The motivation is to determine if there are particular trends over time.

A project for 2013 Baseball Hack Day on Saturday, March 30, 2013 at thoughtbot by Daigo Fujiwara and Diane Williams. Data is from MLB.com. Available on github. Also, I put the data on Google Doc.

You can hide and show teams by clicking/tapping on the legend above the chart. You can zoom in by selecting year range by click/tap and dragging on the chart. Michael Lewis' Moneyball was released in 2003.