Whiff Rate

Whiff rate is the percentage of swings that result in a complete miss, the bat goes around and does not make any contact with the ball. MLB tracks this as swinging strike rate or whiff rate, and the league average sits around 25-26% per swing.

How It Is Calculated

Whiff rate = Swings where the bat misses the ball / Total swings

This is different from strikeout rate (which measures at-bat outcomes) and chase rate (which measures swings at pitches outside the zone). A hitter can whiff on a pitch inside the zone or a pitch well outside it.

What High Whiff Rate Signals

A high whiff rate typically indicates one or more of the following:

• Bat path issues: the barrel is not traveling through the hitting zone efficiently; the bat passes over or under the ball rather than through it
• Timing problems: the hitter is early or late, causing the barrel to miss the ball's location at contact
• Pitch recognition gaps: the hitter is expanding the zone and swinging at pitches they cannot make contact with
• Vulnerability to a specific pitch: breaking balls in the dirt or fastballs at the top of the zone produce high whiff rates for specific hitter profiles

Whiff Rate by Pitch Type

Pitchers and analysts track whiff rate by pitch type to find weaknesses. A hitter who whiffs 40% on changeups is a predictable target in two-strike counts. A hitter with low whiff rates across all pitch types is a contact-first player who puts the ball in play consistently.

Coaching Application

At the youth level, you can observe whiff rate informally. A player who swings and misses frequently at tee work is likely dealing with a bat path issue. A player who misses in batting practice but not on the tee has a timing or pitch recognition problem. The drill that will help depends on what is causing the miss.

A moderate whiff rate is not always a problem, power hitters often have higher whiff rates as a cost of their swing style. The question is whether the misses are concentrated on bad pitches (which is acceptable) or on pitches the hitter should be able to handle (which needs work).