He has had more than 25 plays premiere on and Off-Broadway in New York City and eight at the South Coast Repertory Theatre in Costa Mesa, California, including The Violet Hour, Everett Beekin, and Hurrah at Last.
[1][2] Greenberg is perhaps best known for his 2003 Tony Award winning play, Take Me Out, about the conflicts that arise after a Major League Baseball player nonchalantly announces to the media that he is gay.
[6] At Princeton, Greenberg studied creative writing under Joyce Carol Oates and roomed with future Harvard economics professor Greg Mankiw.
His adaptation of August Strindberg's Dance of Death ran on Broadway in 2002, starring Ian McKellen, Helen Mirren, and David Strathairn.
[10][11] In 2013, Greenberg worked on three shows: on Broadway, an adaptation of Breakfast at Tiffany's[12] and The Assembled Parties, and the book for the musical Far From Heaven, which opened in June 2013 at Playwrights Horizons.