None, Sivero who played Genco in GF2, also played a bystander in GF but no speaking lines in that one. Caridi I remember had something to do with Majestic River, then reading his bio realized that it was that Copy Right infringement, where he was kick out of Ampas.

"I have this Nightmare. I'm on 5th avenue watching the St. Patrick's Day parade and I have a coronary and nine thousand cops march happily over my body." Chief Sidney Green