Isgro is a soldier in the NY-based crew that was run by Joseph Giordano until the latter died in 2013. Donnie Shacks comes from the NY-based crew he used to run and is currently run by Joseph Amato. Shacks was semi-retired before he returned to NY to be acting underboss. Isgro has always been in California but never been a captain. He's simply a soldier of a NY crew and he happens to be active on the west coast. He's had associates under him but I suppose that wouldn't be a crew in the formal sense of the word.

DeLeo was an unique case and one of the few times even if would question the assertion that he was acting boss. He did fulfill certain functions of that position like attend high level meetings and making ceremonies. But he wasn't in a position to be what an acting boss does - run things day to day on the street in NY. His indictment basically showed him running his own small crew up in Boston. But that's gone now.