As expected, it appears Sid Rosenberg's departure from WFAN was of his own making, after not showing up Sunday for his stint on the New York Giants pregame show. While he "resigned," that was strictly a courtesy that station management extended, and likely did so grudgingly given Rosenberg's history.
While no one's commenting officially, indications are Rosenberg was in the wrong place at the wrong time, namely Atlantic City, given that he's a recovering drug and gambling addict, as well as an alcoholic.
Given his scatalogical shtick, the temptation would be to say good riddance. But it's hard to kick a man when he's down, especially when he's fallen so far that he's all but impossible to reach.