Game score was originally developed by Bill James. It was designed to have an average of 50. It was good and can be found at Baseball Reference. Tango Tiger tweaked it into the version provided on the FanGraph site. Then 538.com tweaked it into a version that they use in their model to predict the odds for each game.
Three versions of Game Score (there may be more) can be found at Baseball Reference, FanGraphs, and 538.com. When we look at Diamondback starters, we will average the three game scores.
What are the most significant differences?
- Baseball Reference definition.