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Over the last few years, we have seen a number of rule changes to Major League Baseball. This year is no different, with the addition of the Automated Ball-Strike System (ABS) at the major league level.
It was originally implemented in the minors starting in 2022, and a few stadiums began using it in spring training last year. It has also been used in the Arizona Fall League since 2024, and they added a “check swing challenge system” last year that may be on the horizon.
MLB players and fans got their first glimpse of the future at the 2025 All-Star Game when the system was implemented.
But the Colorado Rockies got their first taste of it last Friday with the start of spring training games. Opinions varied, but, overall, players and coaches think it’s a good addition to MLB — plus, many of them first experienced ABS in Triple-A Albuquerque.
“I think it’s good,” said Warren Schaeffer. “I’m looking forward to seeing how each team handles it differently. It’s definitely a point of strategy, and each team is going to do it differently.”
Brenton Doyle sees in it a way to keep everyone honest.
“It keeps umpires accountable here and there,” Doyle said, “and when [the umpires] do miss, they know you know where they’re missing. So I think it’s a good reminder for them, and it’s also a chance for us to maybe get some good out of it, too.”
For Hunter Goodman, it’s a way to empower hitters.
“I think it’s interesting,” said Goodman. “But I think in those big situations – in big games – it gives the player the power if they think something was wrong versus getting rung up in a big situation. Now you have the power to say, ‘Alright, I think that was wrong.’ So I think it’ll be cool to see. I think there’ll be some fan interaction with it, and that’ll be exciting as well. I think it’ll be fun.”
Goodman also offered some insight as to how the Rockies are practicing with it during spring training.
“In some of the live at-bats, we would have the TrackMan up, and I’d catch a pitch and be like, ‘That’s a strike,’” he said. “And then we look at the TrackMan and see what it was and stuff like that.
“Or even our hitters sometimes in lives, (with) the pitching coach or the hitting coach calling pitches,” he continued, “and then they call one and the hitters say, ‘I think that was off,’ and then you look at the TrackMan. So we’re trying to figure it out in different ways.”
Tanner Gordon said they’ve discussed a slightly different ABS strategy for pitchers..
“We’ve talked about just kind of feeling out the game,” Gordon said. “Obviously, you’re not going to challenge the second pitch of the first inning, but a high-stakes pitch, maybe. Maybe with the game on the line, maybe in the seventh or eighth inning that can turn the game one way or another.”
“You definitely want to use it in key situations,” Braxton Fulford added, “big counts, 1-1 counts are a big one. There’s a big difference between a 2-1 count and a 1-2 count.
“Same thing offensively,” he continued. “If you have runners on base and it’s late in the game, you want to use it in those key situations as opposed to just using it. Early in the game, when you think it might be a strike, might not be the best time to use it.”
Fulford was also part of two challenges on Friday – one that went his way and one that went the other way.
“I was struck out on an ABS strike, and then I got one myself, which is a good feeling,” he said. “You think it’s a strike, but you could never do anything before, and now if you think it’s a strike, you can challenge it and get it overturned. It’s kind of a big momentum swing for you and your team.”
Jordan Beck and Kyle Karros acknowledged the inconsistencies they’ve faced with it, but overall are still in favor.
“I think when I was out there on Day 1 (in Triple-A), it seemed like it was pitcher friendly that day because the catcher was, like, 4-for-4 or something,” Beck said. “But I think it’s good. Pitchers still have to throw strikes and stuff, and hitters need to know their zones as well, so I think it’s good.”
“Friday was a unique day,” Karros said. “I feel like literally every single ABS challenge was called a ball and then overturned into a strike — oftentimes two strikes — and that was the end of your at-bat, which feels a little weird just waiting to see if you get punched out. But I think it’s going to be good.”
Karros also acknowledged that he never used it in Triple-A because he wasn’t sure it was a worthwhile skill to learn.
“I felt like it didn’t really make sense to use it,” he said. “If we [didn’t] use it in the big leagues, why would I use it in Triple-A? So I didn’t use it at all then, but I know some guys were challenging.”
He did say he will “100%” start challenging now, though.
Like everything else, Schaeffer has a plan and a framework for teaching his players how to navigate the ABS system effectively.
“It’s not in the hard rules but more about education of the players in terms of game situations and general game awareness, especially in the minor leagues when you’re trying to develop more game awareness,” Schaeffer said.
“When to use it in a higher leverage situation, and if it wasn’t used in a higher leverage situation, it was a conversation behind closed doors about getting better decisions made. Pitchers were not allowed to challenge because of, I think, for obvious reasons, in terms of their body’s moving, their head’s moving, the catcher’s moving the ball… there’s a bunch of different things. And the catcher pretty much knows the strike zone back there.”
Goodman also acknowledged that everyone is experimenting and getting used to the new system.
“During spring training, everybody’s trying to figure things out, whether it’s hitting or pitching or defensive stuff,” he said. “So it’s a great time for us as catchers and hitters to figure out the zone and challenge things and see where we’re at.”
So far, the Rockies have been part of 23 challenges so far and have won 10.
This will be a story to watch in 2026.
Over the weekend, Patrick Saunders and I walked across the concourse into “enemy territory” to chat with an old friend wearing a different uniform. Nolan Arenado is turning 35 in a few months, but is hoping to bounce back after a down year in St. Louis. Warren Schaeffer offered some memories of their playing days, as well, and is excited to play against him in a different role.
My take will run next week on the SB Nation MLB home page, so be on the lookout!
Amador looking to make noise in Rockies’ 2B battle | MLB.com
Adael Amador is one of many young Rockies fighting to break camp this year. After a meteoric rise, the middle infielder hit a snag as soon as he hit the majors and seems to be slowly fading behind other players who are more MLB-ready. Warren Schaeffer and Josh Byrnes offer their insights as to what Amador could bring to the table in 2026, and the 23-year-old himself says “my confidence was always high.”
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