Tim Kurkjian predicts what we'll see this season as Rob Manfred has warned against on-field retribution vs. the Astros. (1:00)

PORT CHARLOTTE, Fla. -- Commissioner Rob Manfred warned Grapefruit League managers Sunday night against acts of vigilante justice -- pitchers targeting the Houston Astros with beanballs because of their illicit sign stealing -- and Manfred was expected to impart the same message to Cactus League managers Tuesday night.

But Manfred's effort is already generating frustration in some corners of the industry.

"The Astros win again," one evaluator said.

As the anger at Houston players continues to boil among other teams and players, pitchers such as the Cleveland Indians' Mike Clevinger and the Los Angeles Dodgers' Ross Stripling have hinted at the possibility of throwing at Astros hitters. Boston's Chris Sale and the Dodgers' Alex Wood are among veterans who have said they expect opponents to police the game on the field, to some degree.

Over the weekend, new Astros manager Dusty Baker responded, saying, "I'm depending on the league to try to put a stop to this seemingly premeditated retaliation that I'm hearing about. And in most instances in life, you get kind of reprimanded when you have premeditated anything. I'm just hoping that the league puts a stop to this before somebody gets hurt."

Manfred acknowledged the concern and said he intended to speak to managers about the possibility, which he did Sunday.

A concern among the other teams, however, is that by putting opponents on notice in this way, Manfred runs the risk of pushing umpires into overreaction -- misreading intent of pitchers who simply miss their targets and hit Houston hitters accidentally rather than throwing at them on purpose.

"If the Astros hitters know they're going to be protected and that the umpires will be throwing out pitchers [aggressively], they'll have the same advantage they had before -- they'll know what's coming," an American League staffer said. "If the pitchers can't pitch inside against the Astros, that'll work to their advantage."

Under current rules, umpires will issue warnings after pitches they deem suspect, sometimes drawing anger from one or both managers because of the concern that other pitchers in the game will be more reluctant to pitch inside.

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The fear among at least some teams about Manfred's early action on behalf of the Astros is that it will at least make pitching inside more problematic for opponents, and perhaps lead to unjust ejections.

As one official noted: No set of hitters other than the Astros will operate with that kind of preemptive advocacy.

"And that's just not right," he said.

Manfred was asked during his news conference Tuesday about how to prevent umpires from getting caught up in the heat of the moment when differentiating between an accidental hit by pitch and an intentional beanball.

"Look, I think the best we can do on this topic -- and I've had two meetings in the last 48 hours with field managers about this -- my concern here is that whenever somebody is throwing intentionally at a player, it creates the risk of a serious, serious injury," Manfred said. "And I've asked the managers to work with their players to prevent that type of activity, which can lead to serious injury. We'll be working closely with the umpires; we know there's gonna be difficult situations.

"But I can't tell you that I have a magic bullet to prevent those issues. All we can do is get in front of the issue. We're really cognizant of it, and we're already taking steps to try to minimize those sorts of problems."