We need a common name for this John Bolger/John Michael Bolger. Please have a look at this Who is Who thread for more information on all John Bolgars involved here…

John Michael Bolger (1956): Actor; aka. John Bolger

Born June 27th, 1956 in New York City, New York, USA
Known for: Carlito's Way, War of the Worlds, Third Watch, Twins and many more including the Law & Order series'.
Documentation: Wikipedia, IMDB as John Michael Bolger (I), Common name thread, Aveleyman, Wikia.com

John Bolger  (0)

John Michael Bolger  (5)
• Delirious - confirmed by T!M
• Hunter: The Complete Series - confirmed by T!M
• Public Enemies - confirmed by AiAustria
• Twins - confirmed by T!M
• War of the Worlds - confirmed by AiAustria

unconfirmed  (21)
• Beauty and the Beast: The Second Season
• Beauty and the Beast: The Third and Final Season
• Brooklyn South: The Complete Series
• Carlito's Way
• Delirious - confirmed by T!M
• The Equalizer: Season One
• ER: The Complete Third Season
• Law & Order: Special Victims Unit - The Eighth Year: 2006-2007 Season
• Law & Order: The Fourteenth Year: 2003-2004 Season
• Law & Order: The Tenth Year: 1999-2000 Season
• NYPD Blue: Season 04
• NYPD Blue: Season 09
• Pacific Blue: The Complete Second Season
• Pacific Blue: The Complete Third Season
• Person of Interest - L'intégrale de la saison 1 (Person of Interest: The Complete First Season)
• Person of Interest: The Complete First Season
• The Pretender: The Complete Second Season
• Private Parts: Widescreen Collection
• Private Parts: Widescreen Collection
• Rounding First
• Third Watch: The Complete Second Season
• Unforgettable: The Third Season

That was fast. I didn't even sort out the Bolgers in my data base... 

Person of Interest: The Complete First Season: Episode 23 (2011)  ->  JOHN BOLGER  credited as Sam Romano
end credits @ 0:43:39

Private Parts: Widescreen Collection - John Michael Bolger as Music Awards Technician

Carlito's Way - John Michael Bolger as Cop