Glossary: Catching
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the number of passed balls and wild pitches allowed by the catcher
the number of strikes the catcher actually received
pitches the catcher received that could have resulted in a wild pitch or passed ball; this is when runners are on base or a dropped third strike is possible
the run value accumulated from preventing wild pitches and passed balls (.28 per PB/WP saved)
There's a factor for each year-level combination which varies from less than 0.20 to more than 0.33, averaging around 0.27. This factor is multiplied times EPAA times EPAA chances (Blocking Chances) to get EPAA Runs (or Blocking Runs).
the difference between actual and predicted strikes received by the catcher
FRAA_ADJ = CSAA_RUNS + EPAA_RUNS + TRAA_RUNS + SRAA_RUNS
= Framing Runs + Blocking Runs + Throwing Runs
FRAA_ADJ is then added to the "normal" FRAA components, such as fielding ground balls, to generate a total FRAA for the catcher.
how many pitches a catcher had a chance/need to frame
how many runs RPM would assign using a generic .14 runs available per frame
runs RPM credits to the catcher, using the ball-strike context to calculated run value
the difference between actual and predicted passed balls and wild pitches allowed by the catcher
the number of passed balls and wild pitches predicted by RPM
the number of strikes the catcher is expected to have received according to RPM
This stat details the additional called strikes outside the reference zone that are credited to the pitcher after accounting for catcher, umpire, pitch type, etc. This stat is calculated on all called pitches (i.e., balls not in play). Pitcher CSAA is a proxy for command, or the pitcher's ability to locate the ball precisely.
Base "CSAA" values are the "expected" or "mean" values for each player.
We're now also pleased to provide, for seasons 2008 to the present, the standard deviations (SD) for both CSAA and CSAA / Framing Runs. SDs allow you to calculate uncertainty intervals to say how certain we are that the true measurement of the player falls within the defined interval.
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