Robot umpires will not be introduced in pro softball for the foreseeable future, according to Kim Ng, the commissioner of the Athletes Unlimited Softball League. She stated that the league is not ready for the Automated Ball-Strike Challenge System (ABS) like MLB has implemented.
Key points
Robot umpires are not coming to pro softball yet
Kim Ng emphasizes the league's lack of tenure compared to MLB
The ABS system allows appeals on ball and strike calls
MLB implemented ABS in the 2026 season
ABS received positive feedback from players and fans
Mentioned in this story
Athletes Unlimited Softball LeagueMLBKim Ng
Robot umpires arenât coming to pro softball just yet.
Kim Ng, former Marlins GM and current commissioner of the MLB-backed Athletes Unlimited Softball League, said Friday that pro softball is ânot there yetâ on implementing an Automated Ball-Strike Challenge System (ABS).
âWe donât have the tenure that MLB does, we havenât necessarily experienced what MLB has,â Ng said in response to a question from Front Office Sports. âUntil something really is glaring, we will address it when it comes to the surface.â
The ABS system, which allows players to appeal umpiresâ ball and strike calls through tracking cameras that monitor pitches, was implemented in MLB beginning in the 2026 season. It caught on quickly with players, with 124 challenges made in the first four days of the regular season and 67 of them resulting in overturned calls. MLB commissioner Rob Manfred also said it was a hit with fans.
Just over a month after MLB introduced ABS, it will make its way to college baseball, debuting at the SEC tournament. AUSL, Ng says, doesnât have the adequate data yet to implement this system, but sheâs not totally ruling it out for the future.
âWe definitely need to do something about this, but weâre not there yet,â Ng said.
Ownership and Markets
AUSL will begin its 2026 and second overall season just days after the NCAA softball season ends in early June. The biggest change from season one is that teams will be playing in six different home markets, rather than operating on a touring league model.
However, despite each team having a distinct location now, they will still all be under the ownership of Athletes Unlimited.
Q&A
Why are robot umpires not being implemented in pro softball?
Kim Ng stated that pro softball is 'not there yet' for the Automated Ball-Strike Challenge System, citing a lack of experience compared to MLB.
What is the Automated Ball-Strike Challenge System (ABS)?
The ABS system allows players to appeal umpires' ball and strike calls using tracking cameras that monitor pitches.
When was the ABS system implemented in MLB?
The ABS system was implemented in MLB starting with the 2026 season.
How successful has the ABS system been in MLB?
In its first four days, the ABS system saw 124 challenges, with 67 resulting in overturned calls, indicating a positive reception from players.
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âWhatâs interesting about being a single-owner entity is that you create guardrails in terms of how you want to present the game and present your players,â Ng said. âUnderstanding that each market is different, youâll do some things differently, but for the most part youâre applying on a consistent basis.â
However, Ng says she is âentertaining allâ when it comes to ownershipâincluding the possibility of bringing multiple owners to the league down the line. Many newer leagues like the PWHL and Premier Lacrosse League are single-owner entities, but PLL founder Paul Rabil noted to FOS the conflict-of-interest concern under this model, and that a multi-ownership system was required to become a top five North American sports league.
AUSL currently consists of the Chicago Bandits, Carolina Blaze, Utah Talons, Texas Volts, Portland Cascade, and Oklahoma City Spark. The latter two teams were expansion teams added ahead of the 2026 season, while the Bandits and the Spark existed as teams in previous professional softball leagues.
The Spark, founded in 2022 as part of the now-defunct Womenâs Professional Fastpitch, played as an independent team from 2024 until November 2025, when it joined the AUSL.
âOn the Spark the last couple of years, because we didnât have that [top] competition, we were excluded from the professional softball conversation,â Spark player Kinzie Hansen-McKinzie told FOS. âBeing able to be part of the AUSL, play that competition, and be included in those conversations is very exciting.â
The AUSL recently concluded its 2026 college draft on May 4. It will kick off its second season on June 9, with games on various ESPN platforms including ABC.