Baseball has never lacked data. But when it comes to workload, the game still relies heavily on pitch count.
Pitch counts show how many pitches were thrown. They do not show the intensity, accumulated load or movement behind each action.
Swings are recorded even less consistently, while significant work completed in bullpens, batting cages, warm-ups, backfields and offseason programs may never enter the record at all.
The STATSports Baseball Metric Suite closes that gap by automatically detecting and quantifying individual pitches and swings using the torso-worn APEX 2.0 unit.
Every pitch, every swing. Measured wherever it happens.
Counting Is Not Measuring
A maximum-effort pitch and a controlled bullpen throw each add one to a traditional pitch count. The number changes, but the difference between the two actions remains invisible.
The same limitation applies across entire sessions. Two athletes may both complete 40 pitches, yet experience very different levels of intensity and accumulated workload.
STATSports moves beyond the count by attaching objective movement data to every detected action. Practitioners can see not only how much work an athlete completed, but also the intensity and load behind it.
Measurement That Travels With the Athlete
APEX 2.0 is worn between the shoulder blades, where its accelerometer and gyroscope capture the acceleration and rotation of the torso during each pitch and swing.
There are:
- No cameras
- No installation
- No calibration
- No operator required
Because the measurement is worn rather than installed, it travels with the athlete – from the club facility to the bullpen, batting cage, private training facility or offseason program.
The unit records continuously throughout the session. Once the session is processed, Sonra automatically identifies each action, classifies it as a pitch or swing, and calculates the associated metrics.
What the Metrics Show
Every detected pitch and swing becomes an individual, time-stamped action record covering four key areas:
Volume
Pitch Count and Swing Count show how many baseball-specific actions were completed.
Intensity
Peak Acceleration captures the highest accelerometer magnitude during the action.
Peak Rotation captures the highest rotational velocity recorded by the gyroscope.
Accumulated Load
Physical Load measures the accumulated changes in acceleration across the action.
Rotational Load measures the accumulated changes in rotation across the action.
Movement Profile
Forward Lean, Torso Rotation and Side Tilt describe how the athlete’s rotational movement is distributed across the three axes of the torso-worn unit.
Together, these metrics turn a session from a single total into a sequence of individual efforts.
From Individual Actions to Long Term Trends
Action-level records aggregate into separate pitching and hitting summaries within Sonra.
Practitioners can review:
- Counts, peaks, averages and totals
- The intensity of every individual action
- Accumulated physical and rotational load
- Effort patterns throughout a session
- Changes across sessions and training phases
This creates a consistent view from action to session to season.
The primary application is comparing each athlete against their own history, typical effort and normal ranges. Rather than treating every player-or every pitch-as equal, staff can monitor how an individual’s volume and intensity change over time.
Field-Verified Against Video
The deployed detection system was field-verified at a US Division I collegiate baseball program.
Across 45 athlete sessions, 1,269 pitches and swings were manually identified using synchronized video and matched against the system’s detections.
The results showed:
- 1,267 of 1,269 actions correctly detected and classified
- 99.8% overall detection and classification accuracy
- All 526 verified pitches correctly identified
- 741 of 743 verified swings correctly identified
- 42 of 45 session counts matching video exactly
- A mean absolute error of 0.1 actions per session
These results verify the system’s ability to detect, classify and report individual baseball actions in structured training sessions.
They do not mean that every metric value has been validated against laboratory-grade motion capture. That separate validation work remains ongoing. STATSports distinguishes clearly between what has been field-verified today and what remains under continued development.
What This Means for Baseball Programs
The Baseball Metric Suite gives performance and medical teams objective information in the environments where workload has traditionally been hardest to see.
It can support:
- Offseason workload progression
- Return-to-throw programs
- Return-to-swing programs
- Spring training preparation
- In-season workload monitoring
- Individual athlete profiling
- Training and recovery planning
Pitch and swing data is processed within Sonra alongside the athlete’s existing performance data. Staff can review actions and sessions on screen or export structured data into their existing athlete-management and analysis systems.
A Workload Tool, Not a Medical Device
The Baseball Metric Suite measures movement and workload at the torso. It does not measure the arm, elbow stress, joint torque or tissue-level loading.
It is a monitoring and workload-description tool. It does not diagnose, predict or prevent injury.
Physical Load and Rotational Load are most valuable when an athlete is compared against their own previous data. They should not be treated as absolute rankings of which athlete worked harder.
The purpose is to give qualified performance and medical practitioners more objective information – not to replace their expertise.
Every Pitch. Every Swing. Quantified.
Baseball workload does not exist only on the mound or during competition. It accumulates across bullpens, batting cages, warm-ups, private facilities and offseason programs.
APEX 2.0 makes that work visible using one torso-worn unit and one connected workflow in Sonra.
Count the action. Measure the effort. Monitor the progression.
Or contact your STATSports representative to learn more.
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