Bill Harkleroad (born January 8, 1949), known professionally as Zoot Horn Rollo,[1] is an American guitarist.

[2] Born in Hawthorne, California, Harkleroad was trained as an accordionist as a child but changed to guitar in his teens.

His book, Lunar Notes, describes some of the tensions that contributed to the split between Captain Beefheart and the other band members.

He continued his involvement in another capacity, however, as a record store manager and guitar instructor in Eugene, Oregon.

[2] In 2013, Harkleroad contributed lead guitar to a psychobilly track on the Eugene-based band Cherry Poppin' Daddies' album White Teeth, Black Thoughts.