On-Plane Efficiency
Also known as: on-plane efficiency, on plane efficiency, on-plane percentage, good on plane efficiency, plane efficiency, OPE swing metric
On-plane efficiency is a swing-sensor metric for the percentage of the swing in which the bat stays on the plane it will meet the ball on. A higher number means the barrel spends longer in line with the pitch. One sensor maker recommends an average of 70 percent or higher, within a range of about 65 to 85 percent.
The bat's angle at contact sets the plane for that swing. On-plane efficiency measures how much of the swing the bat spends on that plane. A bat that gets on plane early and stays there gives more room for timing errors.
The number connects to other sensor readings. A hitter whose barrel starts too steep or too flat, often seen in early connection, usually has lower on-plane efficiency. It measures duration, not direction. Attack angle tells you the direction the barrel is moving at one moment.
Treat it as one reading among several. Targets come from the sensor maker's own data, and readings from different devices may not match. Compare a hitter with himself over time on the same device. The same maker lists an MLB average of 68.6 percent.
Tips by skill level
Read on-plane efficiency as how long your bat stays in line with the pitch. Longer usually means more room to make contact.
If on-plane efficiency is low, check early connection first. A barrel that starts in a good position usually stays on plane longer.
Example
A high school hitter's on-plane efficiency sits near 55 percent, and his early connection reads too high. His coach works on a better bat angle at the start of the swing. Over a few weeks the reading climbs into the 60s and his mishits drop.
Why it matters
A barrel that stays in line with the pitch longer turns small timing errors into contact. On-plane efficiency puts a number on that window.
Common mistakes
- Chasing the number without checking video
- Comparing readings from different sensors
- Confusing on-plane efficiency with attack angle
- Judging it from a single session
Frequently asked questions
What's a good on-plane efficiency?
One sensor maker recommends an average of 70 percent or higher, within a range of about 65 to 85 percent. Compare your own numbers over time on the same sensor.
What is on-plane efficiency in baseball?
It is the percentage of your swing where the bat stays on the plane it meets the ball on. A higher number means the barrel spends longer in line with the pitch.
How do I improve on-plane efficiency?
Start the swing with the bat in a good position, which sensors read as early connection. Tee work at different heights helps the barrel match pitch location.
Sources
Related terms
- On-Plane SwingAn on-plane swing travels along the incoming pitch's flight path through the hitting zone. This keeps the barrel and ball aligned for a longer window and converting timing errors into contact rather than misses.
- Attack Angle (Batting)Attack angle in batting is the vertical angle of the bat path through the hitting zone. A slightly upward attack angle matches the pitch plane for hard contact. Statcast treats 5 to 20 degrees at contact as the ideal range.
- Early Connection and Connection at ImpactEarly connection is a swing-sensor metric for the angle between the hitter's body tilt and the bat's vertical angle as the downswing starts. One sensor maker targets about 90 degrees, within roughly 80 to 105. Connection at impact is the same relationship at contact. Together they show whether the barrel starts and stays in a strong position.
- Vertical Bat AngleVertical bat angle is the tilt of the bat compared with level at contact. Zero means the barrel and knob are level, and a negative number means the barrel is below the hands. Almost every hitter reads negative. The number gets more negative on low pitches and less negative on high ones.
- Bat PathBat path is the 3D route the barrel travels from load to finish. Its shape through the zone, more than raw bat speed, decides hard or weak contact.
Related guides & benchmarks
Work on the cause
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