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.
- Los Angeles Angels was known as California Angels (1965–96), and Anaheim Angels (1997–2004)
- Houston Astros were known as Colt 45's 1962-64
- Oakland Athletics were in Kansas City 1955–1967
- Atlanta Braves were in Milwaukee 1953-65
- Milwaukee Brewers were Seattle Pilots in 1969
- Tampa Bay dropped "Devil" from their name in 2008
- Texas Rangers were known as Washington Senators from 1961-71.
- Minnesota Twins were know as Washington Senators from 1901-60.
- Florida Marlins became Miami Marlins in 2012
- Montreal Expos became Washington Nationals in 2005