K%
Strikeout rate — share of plate appearances that end in a strikeout.
What K% means
Plate-appearance-rate version of strikeouts. League average ~22% for hitters; lower is better.
How K% is calculated
K% = K / PA
What counts as a good K%
Lower is better — roughly .270 is poor, .220 average, .180 good, and .140 or better elite.
Also written
strikeout_pct · k_rate