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. 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,
Chinese Friends and
The Long Christmas Ride Home. McCormack and Rashida Jones worked on the script of
Toy Story 4. They ultimately withdrew from the project in November 2017 and received "story by" credit. ==Personal life==