Kim Ng is leaving the Miami Marlins after three seasons as general manager, Marlins chairman and principal owner Bruce Sherman announced Monday.

Ng, 54, became the majors’ highest-ranking woman in baseball operations and the first female GM in the four major North American professional sports leagues in a groundbreaking hire in November 2020.

The Marlins exercised their team option for her to return for the 2024 season, Sherman said in a statement, but Ng declined her mutual option.

“Last week, Bruce and I discussed his plan to reshape the Baseball Operations department. In our discussions, it became apparent that we were not completely aligned on what that should look like,” Ng told the Athletic on Monday. “I felt it best to step away. I wish to express my sincere gratitude and appreciation to the Marlins family and its fans for my time in South Florida. This year was a great step forward for the organization.”

Ng brought in Marlins Manager Skip Schumaker ahead of the 2023 season, and he led Miami to an 84-78 record and its first postseason berth since the pandemic-shortened 2020 campaign. The last full season in which the Marlins made the playoffs was in 2003, when they won the World Series.

Miami lost to the Philadelphia Phillies in the Wild Card Series earlier this month.

Ng was the fifth GM in the Marlins’ history. Sherman said the club will immediately begin its search for new leadership.

“We thank Kim for her contributions during her time with our organization and wish her and her family well,” Sherman said.

GIANTS: Alyssa Nakken, who became the first woman to coach on the field in a major league game when she worked first base for San Francisco in April 2022, has interviewed for the Giants managerial vacancy.

President of Baseball Operations Farhan Zaidi confirmed Sunday night that Nakken had gone through a first-round interview last week. The Athletic first reported Nakken had interviewed for the job.

Her husband, Robert, announced in August on social media the coach is expecting the couple’s first child – a girl – on Feb. 9.

Zaidi has said he hopes to find a new manager by the start of free agency to replace Gabe Kapler, fired with three days remaining in the season. He was 295-248 over three-plus seasons, with the Giants winning a franchise-record 107 games and edging the 106-win Dodgers for the NL West title in 2021 before missing the playoffs the last two seasons.

The Giants finished 79-83 this season after going 81-81 in 2022. They were held to two or fewer runs in each of their final eight games.

The 33-year-old Nakken, a softball star at Sacramento State from 2009-2012, has been a coach on the Giants staff since Kapler hired her in January 2020.

At Sacramento State, Nakken was a three-time all-conference player at first base and four-time Academic All American. She went on to earn a master’s degree in sport management from the University of San Francisco in 2015 after interning with the Giants’ baseball operations department a year earlier.