Mayor de Blasio was met by a chorus of boos by Mets fans at the team’s home opener Monday.
Jeers broke out as soon as the mayor, who is open about his allegiance to the Boston Red Sox, was announced during pre-game festivities at Citi Field.
“Stop inviting him!” one fan yelled from the crowd.
The mayor donned a Mets cap and jersey with “DE BLASIO” on the back, with a No. 6 on it in honor of 1960s-era Red Sox player Rico Petrocelli.