Wexler also was a serious and accomplished playwright. Several of his plays were produced off-Broadway and in regional theaters. His play The Rope was produced at Cafe La MaMa on New York, Red's My Color, What's Yours? won the Cleveland Playhouse Award, and his most recent work Forgive Me, Forgive Me Not was staged in Los Angeles in 1996, winning the Julie Harris Playwright Award, three years before his death.[2]
In the book Andy Kaufman Revealed, Bob Zmuda, Kaufman's friend and writer, relates his experiences working as an assistant for an extremely eccentric, Academy Award-nominated screenwriter, prone to pulling stunts that ranged from the bizarre to the profane. Zmuda refers to the man by the alias Mr X. Mr X's wild antics and boorish behavior are said to have been a major influence in creating Andy Kaufman's iconic alter-ego, the obnoxious lounge lizard Tony Clifton. Zmuda does not confirm Mr. X's identity in the book. However, on the WTF with Marc Maron podcast, he confirmed the long-standing rumor that it was Wexler.[4]
His last manic episode, from November 1998 to February 1999, took a toll on his health. Early in the morning of August 23, 1999, Wexler died of a heart attack at age 73.[5]