RE24

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RE24 is very simple to use for hitters if you are already knowledgeable about runs above average numbers like wRAA. With league average set to zero, any positive value is that many runs above average and some other negative value is that many runs under average. RE24 comprises batting and between at bat baserunning (stolen base, wild pitches, etc), so if a participant has 30.5 RE24, so they had been about 30 runs better than the average player would have been if given the same opportunities. Every win is worth between 9 and 10 runs based upon the year, which means that you may convert RE24 into wins by dividing it from that year’s runs each win. On FanGraphs, we predict this REW rather than RE24.
Remember that RE24 is supplying you with circumstance adjusted runs, and when looking at this statistic you are measuring a player’s operation above or below average given the context in which they were put. If you would like to compare their context neutral stats with their context adjusted stats, then a simple trick is to compare RE24 into Batting Runs plus wSB (or OFF minus UBR). This will let you observe how well or badly timed a hitter’s performance was, but remember, context dependent numbers are less predictive of future performance than context neutral ones.
For pitchers, using RE24 in the language of RA9 or ERA is somewhat trickier. You could just learn to think in terms of runs above average for pitchers just like you do to hitters, however, the choice is to consider about 0.46 runs per inning and subtract the pitcher’s RE24 complete to view it in terms of runs allowed. Then in the event that you handle that new number as runs allowed and multiply be 9 and divide by innings pitcher, then you are going to wind up with something akin to RE24 on a 9 inning scale. Bear in mind that RE24 relies on the run environment and playground so this won’t be ideal. Remember also that while enabling runs is bad, a favorable RE24 is great because it is a step of runs greater than average for pitchers. For starters, you will not typically see dramatic differences, but for relievers you might.
Additionally, while RE24 controls for outs and baserunner placement, it doesn’t create any alterations based on the score of the game and also the inning, meaning a bases loaded situation will be exactly the same in case the score is tied at the ninth inning or if the difference is seven runs in the fourth. In other words, while it controls for the probable number of runs, it doesn’t control for how significant those runs might be from the context of the match. RE24 also does not incorporate any defensive value. All offensive events visit the hitter (or baserunner on steals) and most of defensive events are credited to the pitcher. So while you can swap in RE24 to get Batting Runs + wSB, then you cannot look at a player’s RE24-Wins and telephone that WAR since it doesn’t incorporate all baserunning, any protection, any positional adjustment, or replacement degree.