The New York Mets, Milwaukee and Pittsburgh gave their managers the boot Monday, firing them after disappointing seasons with underperforming teams.

The mediocre Mets got rid of manager Jerry Manuel, along with general manager Omar Minaya, after the team’s fourth consecutive season in which the high-payroll team failed to make the playoffs.

Ken Macha was officially dismissed by the Brewers after consecutive losing seasons that following their 2008 postseason appearance as the NL wild card.

John Russell was booted by the penurious Pirates after 299 defeats in three seasons, which extended the woebegone franchise’s consecutive losing years to a major league record 18.

That raised the total of managers losing their jobs this year to eight.

“The bottom line is to win the games. If you don’t win games, they’re going to get somebody in there with a different voice and try to get the guys to listen to it,” Macha said.

In other moves:

• Cincinnati gave manager Dusty Baker a two-year contract extension through 2012.

• Arizona gave interim manager Kirk Gibson the permanent job, and said interim GM Jerry Dipoto will be vice president of scouting and player development under new GM Kevin Towers.