Triple-A manager Wally Backman leaves Mets organization

Wally Backman was either fired or resigned, and will be leaving the Mets organization to pursue other opportunities, including a possible job as a major league manager.

Triple-A manager Wally Backman has left the Mets organization, GM Sandy Alderson announced on Monday.

He was fired by because he didn't use Brandon Nimmo in the leadoff spot and kept Michael Conforto on the bench against lefties, "defying the organization's wishes," a team source told the NY Post's Mike Puma.

"Backman was reprimanded in writing by Alderson before the 2015 season because the GM was unhappy Backman made public comments about the organization's young pitchers," Puma explained. "Backman was told he would have been…