NEW YORK — New York Yankees closer Aroldis Chapman agreed to accept a 30-game suspension under Major League Baseball’s domestic violence policy, a penalty stemming from an altercation with his girlfriend last October.

Under the discipline announced Tuesday, the four-time All-Star will serve the penalty from the start of the Yankees’ season on April 4. He will lose 30 days of pay — $1,856,557 of his $11,325,000 salary. The agreement specifies he will be eligible for free agency after this season barring any additional suspension for off-the-field conduct that would cost him the necessary service time.

“I found Mr. Chapman’s acknowledged conduct on that day to be inappropriate ... particularly his use of a firearm and the impact of that behavior on his partner,” baseball Commissioner Rob Manfred said in a statement. “I am gratified that Mr. Chapman has taken responsibility for his conduct.”

Chapman became the first player penalized a finite number of games under the policy, which MLB and the players’ association agreed to in August following several high-profile incidents among NFL players. Colorado shortstop Jose Reyes was given an indefinite paid suspension last week, pending a trial scheduled for April 4, following an alleged altercation with him wife in October.

Baseball’s investigation of Chapman stemmed from Oct. 30. Chapman’s girlfriend, 22-year-old Cristina Barnea, told police he pushed and choked her. Chapman said there was an argument but that he was pushed down by Barnea’s brother, eventually getting a handgun and firing eight shots into a wall and window while locked in his garage.

The Davie Police Department and Broward Assistant State Attorney Stefanie Newman declined to file charges, citing conflicting accounts and insufficient evidence.