MLB's Automated Ball-Strike System uses Hawk-Eye pose-tracking cameras to generate batter-specific strike zones and adjudicate challenges in ~17 seconds. Each team gets 2 challenges per game.
Powered by Sony Hawk-Eye (12 cameras per ballpark) and T-Mobile 5G private network.
4,302
Total Challenges
2,169
Overturned
50.4%
Success Rate
4.2
Avg / Game
17.0s
Avg Time
| Date | Matchup | Challenges | Overturned | Success % | Avg Time |
|---|---|---|---|---|---|
| 2026-04-01 | NYY @ HOU | 5 | 3 | 60% | 16.2s |
| 2026-04-01 | LAD @ CHC | 3 | 1 | 33% | 17.8s |
| 2026-04-01 | ATL @ PHI | 6 | 4 | 67% | 15.5s |
| 2026-03-31 | BOS @ BAL | 4 | 2 | 50% | 17.1s |
| 2026-03-31 | SF @ SD | 2 | 1 | 50% | 16.9s |
| 2026-03-31 | SEA @ TEX | 5 | 2 | 40% | 18.3s |
Human umpire makes the initial call
Every pitch is still called by a human umpire behind the plate.
Team may challenge the call
Each team gets 2 challenges per game. Catchers, hitters, or pitchers can request.
Hawk-Eye determines the true zone
12 cameras track ball trajectory and batter-specific strike zone via skeletal pose estimation.
Call confirmed or overturned (~17 sec)
Result transmitted via T-Mobile 5G private network to the ballpark display.
Hawk-Eye tracks 18 skeletal keypoints on each batter to generate a personalized strike zone. The zone top is defined as the midpoint between the shoulders and belt; the zone bottom is the hollow of the knee. Width is the fixed 17-inch rulebook plate.
18 skeletal keypoints tracked at 30fps per batter
Zone top = midpoint of shoulders & belt | Zone bottom = hollow of knee
ABS is one piece of a much larger picture. Computer vision is reshaping every sport — from biomechanical injury prediction to automated scouting at scale. BSI's Vision AI Intelligence Hub covers the full landscape: 8 application areas, 40+ companies, and the critical gap between pro and college infrastructure.