Question about Cast of Characters..

I know Vincent "Mancini" Corleone wasn't part of the timeline included at the beginning of the book, but I don't see him in the cast of characters at the beginning of the book. I bought The Godfather Returns when it first came out and finally decided to start reading it. Is he in The Godfather's Revenge?

I don't believe so, No. And if he is, it's only a very minor part that really isn't even worth mentioning. I haven't read the book in a while, so I'm just going by what I remember. If I'm wrong, someone please say so.

I can not believe so.