K/7 · Strikeouts per seven innings
What does K/7 mean in softball?
K/7 is a pitcher's strikeouts per seven innings — softball's version of baseball's K/9.
How to calculate K/7
K/7 = (strikeouts × 7) ÷ innings pitched
A pitcher with 40 strikeouts in 28 innings has a K/7 of 10.0.
What's a good K/7?
In pro softball, 7.0 is solid, 9.0 is very good, and 11.0+ is elite swing-and-miss stuff.
Good to know
- "K" is the scorebook symbol for a strikeout; a backwards K means the batter struck out looking.
- High K/7 pitchers rely less on their defense, which makes their results more repeatable.