Frequently Asked Questions

What is the RunPlusMinus™ statistic?

• It is a single number that combines the batting, fielding, pitching and running on-field performances of players and teams

Why does RunPlusMinus™ claim to be the best?

• It satisfies the five “CRAZI” attributes necessary for an ideal statistic. It is:

• Comprehensive: derived from every player’s participation in every play
• Run-based: measured in runs (real and potential)
• Additive: game, team and player totals have real meaning
• Zero-sum: Offense + Defense values always add to zero

• Independent: player values do not depend on teammates, only on historical averages

• Values for the 2018 Major League Season were calculated from 48 million data points
• Here is comparison between RunPlusMinus and OpenWAR
• RunPlusMinus incorporates the Park Effect

How can RunPlusMinus™ be used?

• To measure and compare the performance of players
• To forecast the performance of teams
• To assist in-game decision making
• To evaluate player trades and roster changes

Where can I read more about RunPlusMinus™?

• We are publishing new articles on Medium that can be found here.

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