It took seven games for Citi Field to reject Jose Siri.

The Mets’ platoon center fielder, who missed most of the season with a broken leg and made his seventh home appearance Friday (and just his second start in Queens since April), was booed often in a 12-6 Mets victory over the Nationals because of a couple misplays and few rough at-bats.

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“He didn’t have a good day,” manager Carlos Mendoza said of Siri, with whom he talked because he wanted Siri to keep his head up.

During a dreadful, four-run third inning, which also featured a poor throw from Brandon Sproat to first base that wound up in rig

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