Early life and education

William Joseph McCormack Jr. was born in 1974 to William Joseph McCormack Sr. and Norah Magdalene Ross McCormack. He has two older sisters, actress Mary McCormack and Michigan Supreme Court Justice & former University of Michigan law professor Bridget Mary McCormack. He graduated from Trinity College in Hartford, Connecticut.

Career

McCormack's key television roles include Jason La Penna on The Sopranos (1999-2001). More recently, he played the role of Leo Spiller, brother of lead character Lucy Spiller (Courteney Cox), in the FX series Dirt. He also played a recurring role as the FBI agent in the television drama In Plain Sight, which stars his older sister, Mary McCormack.

In 1996, McCormack appeared on Broadway at the Criterion Center Stage Right as a member of the ensemble in a revival of the drama play Summer and Smoke (1948) by Tennessee Williams, produced by The Roundabout Theatre Company. He has also appeared in two Off-Broadway theatre productions.

Filmography and television work

(films, except as noted)

Year	Title	Genre	Role	Notes
1999-2001	The Sopranos	drama	Jason La Penna	television series
2001	American Outlaws	action, drama Western	Bob Younger
2002	Abandon	thriller	August
2002	A Midsummer Night's Rave	comedy-drama	Greg
2002	The Shield	drama	Steve Hanratty	television series
2005	Prime	romantic comedy-drama	Palmer
2005	Must Love Dogs	romantic comedy	Jason
2005	Syriana	political thriller	Willy
2006	Right at Your Door	thriller	Jason
2007-2008	Dirt	drama	Leo Spiller	television series
2008	CSI: Crime Scene Investigation	police procedural	Langston Weller	television series
2008-2009	Brothers & Sisters	comedy-drama	Ethan Tavis	television series
2008-2012	In Plain Sight	comedy-drama	Robert O'Conner	television series
2010	Medium	drama	William Gerwin	television series
2011	Paul the Male Matchmaker	comedy	Harry	television series
2011	Alphas	science fiction	Marcus Ayers	television series
2012	Celeste and Jesse Forever	comedy-drama	Skillz	also credited as co-screenwriter
2012	Mob City	crime mystery	Gunman	television series; post-production
2013	The Office	comedy	Wolf	television series

Stage work

Year	Title	Genre	Role	Theatre	Location	Notes
1996	Summer and Smoke	drama	Ensemble (member)	Criterion Center Stage Right	New York City, New York	Broadway revival by The Roundabout Theatre Company
2003	The Long Christmas Ride Home	drama	Stephen	Vineyard Theatre	New York City, New York	Off-Broadway; recipient, 2004 Lucille Lortel Award, Outstanding Featured Actor
2004	Chinese Friends		Stephan	Playwrights Horizons	New York City, New York	Off-Broadway

[ Source: Wikipedia ]