San Francisco Giants president and CEO Larry Baer is taking "personal time away" from the team following an incident with his wife, the team's board of directors announced.
TMZ published a short video last week which appeared to show Baer dragging his screaming wife, Pam, to the ground in a San Francisco plaza.
MLB is leading an investigation into the matter and, in a statement on Monday, the Giants said they were co-operating fully.
Baer is stepping away from day-to-day operations of the team while the situation plays out.
"Mr. Baer has acknowledged that his behaviour was unacceptable, apologised to the organisation and is committed to taking steps to make sure this never happens again," the Giants' statement read.
"He has also requested, and the board has accepted his request, to take personal time away from the Giants beginning today. The board has asked the Giants executive team to manage the day-to-day operations of the club during this period.
"As leaders in the community, we at the Giants hold ourselves to the highest standards and those standards will guide how we consider this matter moving forward."
Baer, who has held his post with the team since January 2012, later told the San Francisco Chronicle he apologised to his wife and police were not contacted.
"My wife and I had an unfortunate public argument related to a family member and she had an injured foot and she fell off her chair in the course of the argument," he said.
"The matter is resolved. It was a squabble over a cell phone. Obviously, it's embarrassing."
Pam Baer told TMZ: "We were having a family fight about someone in my family and that's it."
Larry Baer also issued a statement through the team, saying: "I am truly sorry for the pain that I have brought to my wife, children and to the organisation.
"It is not reflective of the kind of a person that I aspire to be, but it happened and I will do whatever it takes to make sure that I never behave in such an inappropriate manner again."
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