John Mayer, who has been recovering from throat surgery that he recieved in August, has been announced to perform with Zac Brown Band. This performance will take place at the Southern Ground Music & Food Festival in Nashville, Tennessee. This festival will be held at the Riverfront Park on Friday and Saturday, September 21-22. According to a statement made by his publicist "John will be performing on guitar only. He is still recovering from the recent procedure on his vocal cords and will be on vocal rest for awhile." However, this is not the first time John Mayer and Zac Brown Band have crossed paths. Clay Cook, member of Zac Brown Band, attended Berklee College of Music together with Mayer. Cook has also co-written songs along with Mayer for Mayer's albums.