Robot Umpires Leave the Big Leagues, and the Early Winter-Ball Numbers Are In
As the first World Series of the ABS era opens, the Dominican winter league’s early challenge numbers and a new push to sell automated strike zones to amateur diamonds show where robot umpires go next. Plus: BioSteel Teams adds full baseball scoring.
How is ABS working in Dominican winter ball?
Dominican winter ball’s first week with automated ball-strike challenges overturned close to half of disputed calls, and vendors are already selling the same idea to amateur diamonds.
The World Series opens tonight in Milwaukee as the first Fall Classic since MLB adopted its automated ball-strike (ABS) challenge system for 2026. The bigger change for everyday baseball is happening below the majors. The Dominican winter league switched ABS on Oct. 16, overturned 18 of 40 challenges in its first weekend, and an amateur-field vendor is now pitching automated strike zones to tournament and league operators.
The Dominican professional league, LIDOM, opened its 2026-27 season on Oct. 16 with an ABS challenge system built on Trackman tracking and patterned on MLB’s rules. The umpire still calls every pitch, and only the batter, pitcher or catcher can challenge by tapping the cap or helmet, Archysport reported ahead of opening night. Escogido’s Carlos Jiménez made the league’s first challenge in the opener against Licey, and the strike call stood, as reporter Juan Arturo Recio noted on X.
Over the first weekend, players made 40 challenges. The system changed 18 calls (45%) and confirmed 22, according to a tally by El Nuevo Diario. Thirteen of the 18 reversals turned a called ball into a strike. Licey challenged most often (11 times), while Toros del Este challenged once.
By Oct. 22, catchers had emerged as the best judges of the zone. They won 23 of 33 challenges, close to 70%, while batters won 11 of 25 (44%) and pitchers went 4 for 8, El Día reported. League president Vitelio Mejía said the system now gives the league a more precise way to measure umpires’ accuracy on balls and strikes.
LIDOM also limited the first phase to balls and strikes at home plate because broader use would need more stadium staff, league official Sánchez told local press, per Archysport.
These are the first public, game-by-game challenge numbers from a league outside MLB running the system all season.
Managers and players in any league that adopts ABS should expect catchers to drive challenge strategy, and umpires should expect their zones to be measured, not just argued.
Who is selling automated strike zones to amateur fields?
WIN Reality published an explainer on Oct. 22 pitching its SmartPark system as a way to bring “Automatic Balls & Strikes” to travel, high school and tournament diamonds. SmartPark uses fixed optical cameras and pairs the zone calls with a pace-of-play clock, live scoring and Playbook365 roster and schedule integration. Unlike MLB’s challenge model, the company describes calls that skip the challenge pause entirely.
The company frames ABS as backup for the plate umpire rather than a replacement. It recommends that leagues write a fallback rule naming the umpire as the decision-maker on any pitch the cameras can’t track. College baseball got its own on-ramp earlier this fall, when Trackman opened ABS testing for fall ball on Sept. 14 so programs could decide whether to use it in spring conference play. Trackman’s setup asks teams to send every player’s height so it can build a height-based zone.
For adult leagues, the hardware is the hurdle.
Fixed-camera systems belong to the facility, not the league, so the first adult games with automated zones will most likely happen at tournament complexes that already install tracking, not at rented municipal fields.
Umpire recruiting is a chronic problem at every amateur level, and disputed zones are a big reason officials quit.
League officers negotiating with facilities should start asking whether a field has tracking cameras, who owns the data, and what the fallback rule is when the system fails.
BioSteel Teams adds full baseball scoring and a social feed
BioSteel Teams, the free team-management app from the sports-nutrition brand, announced on Oct. 13 a full baseball scoring experience. Scorekeepers can record plays, at-bats and innings with built-in pitch counting, and followers get live play-by-play. The company says recent fixes improved inning status, game completion, pitch-count accuracy and how the scorecard handles runners.
The same update launched the BioSteel Sports Network, with athlete and team timelines, highlight reels and discovery of teams outside a player’s own roster. The app already covered schedules, rosters, attendance, messaging and livestreaming.
Another free app now combines baseball scorekeeping, pitch counts and team operations in one place, a combination GameChanger has long owned.
For managers and league buyers, that adds pressure on price and gives teams one more option to compare before spring registration.
What people are asking
What is ABS in baseball?
ABS, the automated ball-strike system, uses cameras or radar to track each pitch against a strike zone set by the batter’s height. In the challenge version used by MLB and the Dominican winter league, the umpire calls every pitch and players can appeal a limited number of calls to the system.
How often did ABS overturn calls in the Dominican winter league?
In LIDOM’s first weekend of the 2026-27 season, the system changed 18 of 40 challenged calls, or 45%. By Oct. 22, catchers had won about 70% of their challenges, batters 44% and pitchers 50%.
Can amateur or adult baseball leagues use automated umpires?
Yes, if the field has tracking equipment. Vendors such as WIN Reality’s SmartPark sell fixed-camera systems for amateur diamonds, and Trackman supports ABS for college programs. A league still needs a written zone definition and a fallback rule for pitches the system can’t track.
Yours from the on-deck circle,
Gouda
