Acting
John Mainieri is an actor.
Instinct
Det. Jimmy Marino
2018
The Leftovers
Croupier
2014
Blue Bloods
Father Duff
2010
Boardwalk Empire
Hotel Manager
Wonder Wheel
John
2017
Trainwreck
Mob Bar Bartender (uncredited)
2015
The Normal Heart
Cars 2
J. Curby Gremlin (voice)
2011
When in Rome
Man in Elevator
Cayman Went
Hans Kopechne
2009
Meet Dave
Middle-Aged Man
2008
