openWAR: An open source system for evaluating overall player performance in major league baseball
Within sports analytics, there is substantial interest in comprehensive statistics intended to capture overall player performance. In baseball, one such measure is wins above replacement (WAR), which aggregates the contributions of a player in each facet of the game: hitting, pitching, baserunning, and fielding. However, current versions of WAR depend upon proprietary data, ad hoc methodology, and opaque calculations. We propose a competitive aggregate measure, openWAR, that is based on public data, a methodology with greater rigor and transparency, and a principled standard for the nebulous concept of a replacement player. Finally, we use simulation-based techniques to provide interval estimates for our openWAR measure that are easily portable to other domains.
© Copyright 2015 Journal of Quantitative Analysis in Sports. de Gruyter. All rights reserved.
|Subjects:||sports game baseball analysis performance athlete competition software theory performance factor|
|Notations:||technical and natural sciences sport games|
|Published in:||Journal of Quantitative Analysis in Sports|