He’s Mayor de Blasio’s fall guy.

The only city official fired in the just-concluded federal and state probes into de Blasio says he was axed for one reason — to let other civil servants know that they had better keep their traps shut, or else.

“It was a message to any other deputy commissioner or assistant commissioner that if you step out of line, there will be retribution . . . They made sure I got hit,” said Ricardo Morales, a former deputy commissioner with the Department of Citywide Administrative Services.

“This was a continued level of mendacity that I have never seen in government,” he told The Post.

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Though Morales lost his job, de Blasio and his aides are in the clear.

Federal and state prosecutors announced Thursday they were dropping their investigation of political fund-raising by the mayor and his staff.

Morales, 60, who was fired on Feb. 24, said that top City Hall aides turned to him into a pariah after he was grilled by probers last spring.