Tony Sirico only agreed to sign on for the show if it was guaranteed that his character Paulie "Walnuts" Gualtieri would not be a "rat", an informant. As Sirico explained in James Toback's documentary The Big Bang (1989), he had served time in prison for robbery. Altogether, Sirico's rap sheet included at least 28 arrests. Reportedly, he also appeared briefly in an uncredited role in The Godfather: Part II (1974).
Anyone watching Westworld. I put my thoughts on the show on the vomitorium blog. I quite like the series so far. Though some of Maeve's lines are quite corny.