Swing% is the simplest plate-discipline number: out of every pitch a hitter sees, how often does he swing? League average is about 47%. A patient hitter like Juan Soto might run 38%; an aggressive hitter like Tim Anderson might run 56%.

Unlike most stats, Swing% has no inherent "good" direction. Patience can be a virtue (better walk rates, deeper counts, more two-strike pitches you got to see) or a flaw (called strikes pile up, you let mistakes go by). Aggression can be a virtue (you hammer first-pitch fastballs) or a flaw (you chase out of the zone). Either approach can lead to elite production if executed well.

On Baseball Nut, Swing% sits in the Approach section rather than Discipline for that reason. The percentile bar shows where a hitter falls in raw frequency — not whether that swing rate is "right" or "wrong." Pair it with SwStr% to get a fuller picture: high Swing% + low SwStr% is a productive aggressive style; high Swing% + high SwStr% is a chase problem.

What is a good Swing%?

Swing% is not directly used in NUT and has no clear "good" direction — patient hitters and aggressive hitters can both produce elite NUT seasons. It appears in the hitter Approach percentile section as stylistic context, not a verdict.

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