Yes.

Nick Mazzola was born on 5 September 1941 in Brooklyn, New York, USA. He was an actor, known for Vegas Vacation (1997), Casino (1995) and Rain Man (1988). He died on 8 September 1999 in Las Vegas, Nevada, USA.

https://www.imdb.com/name/nm0563627/bio?item=bo0322982

Shared universe confirmed.