But even if Major League Baseball elects to suspend Gurriel, he's nearly certain to appeal, which likely would delay the process so that a decision isn't made until after the World Series.
Darvish, 31, was tagged for four runs off five hits in the second inning, the first of those a solo home run by Gurriel, who later in the Astros dugout put his fingers to the outside of his eyes and pulled the skin tight.
USA Today's Bob Nightengale first reported Gurriel's suspension.
The moment was caught by several baseball fans watching the game, who called the gesture offensive.
Though he wasn't scheduled to address the media like this prior to Game 4, Major League Baseball commissioner Rob Manfred took the podium to discuss the situation surrounding Astros first baseman Yuli Gurriel on Saturday afternoon in Minute Maid Park.
Manfred said the commissioner's office and players association are in agreement that "there is no place in our game" for Gurriel's actions.
Gurriel was born in Cuba and played there and in Japan in 2014 before coming to Major League Baseball a year ago. He will also receive sensitivity training and personally apologize to pitcher Yu Darvish. The immediate reaction of many, especially on social media, was that their use was meant to harm Darvish by mocking his looks and directing a racist slur at him.
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After the game, Gurriel answered for his actions through an interpreter. "I think he's one of the best pitchers in Japan, and I never had success against him".
"The Houston Astros were surprised and disappointed by the behavior displayed by Yuli Gurriel during last night's game".
"First of all, I felt it was important that the suspension carried with it the penalty of lost salary", Manfred said. He said, "I didn't mean to offend anybody in Japan".
Gurriel hopes to speak with Darvish about what happened. He played one season in Japan in 2014. Matt Joyce of the Oakland Athletics and the Blue Jays' Kevin Pillar were both suspended for two games this season after using gay slurs in separate incidents, so there's already some precedent for the commissioner to take action.
The gesture exploded on social media as the game went on, and Gurriel apologized after the Astros' victory.
Gurriel's homerun contributed to a 5-3 Astros win, which gave them a 2-1 lead over the Dodgers in the World Series.