Fielding Run Value is Statcast’s metric for capturing a player’s measurable defensive performance by converting all of Statcast’s individual defensive metrics from different scales onto the same run-based scale, which can then be read as a player being worth X runs above or Y runs below average. Currently, the conversions for those metrics are as follows. (Unless otherwise noted, all metrics are available since 2016.)

How to read it: In 2021, Michael A. Taylor had a Fielding Run Value of +23 runs, which came from 15 runs on range and 7 runs via his throwing arm, making him the most valuable defender in baseball that season.