Seymour Cassel, character actor.
As the obit notes, he did a lot of work with John Cassavetes and Wes Anderson. But his list of credits goes beyond that. He did a guest shot on “Convoy” (the TV series) and was in “Convoy” (the movie). He did several episodes of “12 O’Clock High” and “The F.B.I.”, was in two “Batman” episodes, guested on “Matlock”, and was even in one “ST:TNG” episode.
Never did a “Mannix”, though, as far as I can tell.
(Noted: “Two Tons of Turquoise to Taos Tonight”. Just read the summary.)