NEW YORK (AP) -- David Alan Grier is joining the cast of David Mamet's (MAM'-eht) Broadway-bound play "Race." The 53-year-old actor will star in the production along with the previously announced James Spader (SPAY'-dur), Richard Thomas and Kerry Washington. "Race" opens Dec. 6 at the Ethel Barrymore Theatre. Preview performances begin Nov. 16. Mamet will also direct. Grier has appeared in films such as "A Soldier's Story," "Streamers" and