Mark Teixeira will make his first appearance on the Late Show with David Lettermanon Monday night, August 24th. The show will start at 11:35PM and run until 12:37PM ET on CBS. Tex will also take part in an outdoor batting demonstration during the show. That should be fun. He will probably be the last guest, and they will finish up the show with him hitting balls outside The Ed Sullivan Theater. Vogue editor-in-chief Anna Wintour will also be on the show.