Buck Showalter was fired Sunday as New York Mets manager after a stunningly disappointing 2023 season in which baseball's highest-spending team tumbled from contention by midsummer.

The 67-year-old Showalter said before Sunday's game against Philadelphia that he will not return next year, and a few minutes later the Mets said the team had decided on the change. New York entered 74-86 and 29 1/2 games behind NL East champion Atlanta.

Showalter planned to manage the team Sunday at Citi Field.

New York is expected to hire David Stearns as president of baseball operations above general manager Billy Eppler, and Showalter's departure clears the way for Stearns to pick the next manager.

"We are heading in a new direction, with a new president of baseball operations and we let Buck know we'll be parting ways. We will begin the search for a new manager immediately," Mets owner Steve Cohen said in a statement. "Buck is a generational manager, and we value what he has done for our team, including leading us to a 101-win season and postseason berth last year. The commitment and heart that Buck brings to the game will be felt by our organization for years to come."

Showalter took over as manager before the 2022 season and led the Mets to a 101-61 record last year, when he was voted NL Manager of the Year. New York lost to San Diego in their NL wild-card series, then added three-time Cy Young Award winner Justin Verlander to its pitching staff during the offseason. The Mets boosted their payroll to a record $355 million on opening day, but wound up dealing veterans, including Verlander and Max Scherzer, ahead of the Aug. 1 trade deadline.

"As we look toward the next chapter for the New York Mets, we felt that making a managerial change was the right course of action," Eppler said in a statement.

The Mets then confirmed the news in the statement, saying the team "let Buck know we'll be parting ways."

The Associated Press contributed to this report.